History of Pittsburgh

The Fort Pitt Blockhouse, dating to 1764, is the oldest structure in Pittsburgh.

The site of Pittsburgh, Pennsylvania, United States, is at the confluence of the Allegheny River and the Monongahela River that forms the Ohio River. The history of Pittsburgh began with a struggle between Native Americans, the French and the British over the control of this strategic juncture. Native Americans had populated this region for more than 10,000 years. In 1754, to enforce their territorial claims, the French built Fort Duquesne at the Ohio's head. This triggered the French and Indian War. After British General John Forbes occupied Fort Duquesne, he ordered the construction of Fort Pitt. He named the settlement between the rivers "Pittsborough." During Pontiac's Rebellion, Ohio Valley and Great Lakes tribes besieged Fort Pitt for two months, but their siege was lifted.

Following the American Revolution, the village around the fort continued to grow. One of its earliest industries was building boats for settlers to enter the Ohio Country. The year 1794 saw the short-lived Whiskey Rebellion, when farmers rebelled against federal taxes on whiskey.

Native American era

Native Americans lived near the forks of the Ohio for thousands of years. These are some important villages, most circa 1750s.

For thousands of years, Native Americans inhabited the region where the Allegheny and the Monongahela join to form the Ohio. Paleo-Indians conducted a hunter-gatherer lifestyle perhaps as early as 19,000 years ago. Meadowcroft Rockshelter, west of Pittsburgh, provides evidence that these first Americans occupied the region from that early date.

During the Adena culture, Mound Builders erected a large Indian Mound at McKees Rocks, about three miles from the head of the Ohio. The Indian Mound, a burial site, was augmented in later years by members of the Hopewell culture.

European diseases, such as smallpox, measles, influenza, and malaria, preceded European explorers to western Pennsylvania, devastating the populations of the Native Americans living there.

In the early 18th century, the Iroquois held dominion over the upper Ohio valley from their homelands in present-day New York State. Other Native American tribes in the upper Ohio valley included the Lenape, or Delawares, who had been displaced from eastern Pennsylvania by European settlement, and the Shawnees, who had migrated up from the south.

In 1748, when Conrad Weiser visited Logstown, he counted 789 warriors from ten different tribes:

• Iroquois, or Six Nation:
  • Senecas: 163
  • Onondagas: 35
  • Oneidas: 15
  • Cayugas: 20
  • Mohawks: 74
• Allies of Iroquois:
  • Wyandots: 100
• Others:
  • Shawnees: 162
  • Tisagechroamis: 40
  • Mohicans: 15
  • Lenape (Delaware): 165
  • Total : 789

Shannopin's Town, a Seneca tribe village on the east bank of the Allegheny, was the home village of Queen Aliquippa, but was gone after 1749. Chartier's Town was a Shawnee town. Sawcunk, on the mouth of the Beaver River, was a Lenape (Delaware) settlement and the principal residence of Shingas, a chief of the Lenapes. Kittanning was a Lenape and Shawnee village on the Allegheny with an estimated 300–400 residents.

Struggle for Control of the Forks of the Ohio (1747–1763)

This string of French Forts, built in 1753 and 1754, contributed to the start of the Seven Year's War

In 1748, the first Ohio Company won a grant of 200,000 acres in the upper Ohio valley. From a post at present-day Cumberland, Maryland, the company began to construct an 80-mile wagon road to the Monongahela River.

The French had built Logstown for the Native Americans as a trade and council center, in order to increase their influence in the Ohio valley. In 1749, to bolster the French claim to the region, an expedition headed by Celeron de Bienville traveled down the Allegheny and Ohio. De Bienville warned away English traders and posted markers claiming the territory.

In 1753, Marquis Duquesne, the Governor of New France, sent another, larger expedition. At present-day Erie, Pennsylvania, an advance party built Fort Presque Isle. They also cut a road through the woods and built Fort Le Boeuf on French Creek, from which it was possible at high water to float to the Allegheny. By summer, an expedition of 1,500 French and Native American men descended the Allegheny. Some wintered at the confluence of French Creek and the Allegheny, where, the following year, they built Fort Machault.

Alarmed at these French incursions in the Ohio valley, Governor Dinwiddie of Virginia sent Major George Washington to warn the French to withdraw. Accompanied by Christopher Gist, Washington arrived at the Forks of the Ohio in Nov. 1753, recording his impressions in his journal:

"As I got down before the Canoe, I spent some Time in viewing the Rivers, & the Land in the Fork, which I think extremely well situated for a Fort; as it has the absolute Command of both Rivers. The Land at the Point is 20 or 25 feet above the common Surface of the Water; & a considerable Bottom of flat well timber'd Land all around it, very convenient for Building."

Proceeding up the Allegheny, Washington presented Dinwiddie's letter to the French commanders first at Venango, and then Fort Le Boeuf. The French officers received Washington with wine and courtesy, but did not withdraw.

Governor Dinwiddie then sent Captain William Trent to build a fort at the Forks of the Ohio. In 1754 Trent began construction of the fort, the first European habitation at the site of present-day Pittsburgh. The fort, named Fort Prince George, was only half-built by April 1754, when over 500 French forces arrived and ordered the 40-some colonials back to Virginia. The French then tore down the British effort and built Fort Duquesne.

Governor Dinwiddie launched another expedition. Colonel Joshua Fry commanded the regiment. His second-in-command, George Washington, led an advance column. Washington's unit clashed with the French in the Battle of Jumonville Glen. After the battle, Washington's ally, Seneca chief Tanaghrisson, tomahawked a prisoner, Ensign Joseph Coulon de Jumonville. On July 3, Washington surrendered following the Battle of Fort Necessity. These actions sparked the French and Indian War (1754–1763) (called the Seven Years' War in Europe), an imperial confrontation between England and France fought in both hemispheres.

British and French Forts, 1753–1758, and the routes of the two British campaigns to take the forks of the Ohio

In 1755, Washington accompanied British General Braddock's expedition. Two regiments marched from Fort Cumberland. Following a path Washington surveyed, over 3,000 men built a wagon road 12-feet wide. When complete, Braddock's Road was the first road to cross the Appalachian Mountains. It blazed the way for the future National Road. The expedition crossed the Monongahela River on July 9, 1755. French troops from Fort Duquesne ambushed Braddock's expedition at Braddock's Field, nine miles from Fort Duquesne. In the Battle of the Monongahela, the French inflicted heavy losses on the British. Braddock was mortally wounded. The surviving British and colonial forces retreated. This left the French and their Native American allies with dominion over the upper Ohio valley.

In September, 1756, an expedition of 300 militiamen destroyed the Shawnee and Lenape village of Kittanning. In the summer of 1758, British General John Forbes began a campaign to capture Fort Duquesne. At the head of 7,000 regular and colonial troops, Forbes built Fort Ligonier and Fort Bedford, from where he cut a wagon road over the Allegheny Mountains, later known as Forbes’ Road. On the night of Sept. 13–14, 1758, an advance column under Major James Grant was massacred in the Battle of Fort Duquesne. The battleground, the high hill east of the Point, was named Grant's Hill in the memory of Major Grant. With this defeat, Forbes decided to wait until spring. But when he heard that the French had lost Fort Frontenac and largely evacuated Fort Duquesne, he planned an immediate attack. Now hopelessly outnumbered, the French abandoned and razed Fort Duquesne. Forbes occupied the burned fort and ordered the construction of Fort Pitt, named after British Secretary of State William Pitt the Elder. He also named the settlement between the rivers, "Pittsborough." The British garrison at Fort Pitt made substantial improvements to its fortification. The French never attacked Fort Pitt. The French and Indian War ended with the Treaty of Paris (1763).

Gateway to the West (1763–1799)

Fort Pitt, 1795

In 1760, the first considerable settlement around Fort Pitt began to grow. Traders and settlers built two groups of houses and cabins, the "lower town," near the fort's ramparts, and the "upper town," along the Monongahela as far as present-day Market Street. In April 1761, a census ordered by Colonel Henry Bouquet counted 332 people and 104 houses.

In a final attempt to drive out the British, Pontiac's Rebellion began with an assault on British forts in May 1763. Ohio Valley and Great Lakes tribes overran many forts; one of their most important targets was Fort Pitt. Receiving warning of the coming attack, Captain Simeon Ecuyer, the Swiss officer in command of the garrison, prepared for a siege. He leveled the houses outside the ramparts and ordered all settlers into the fort: 330 men, 104 women and 196 children sought refuge inside its ramparts. Captain Ecuyer also gathered stores, to include hundreds of barrels of pork and beef. Pontiac's forces attacked the fort on 22 June, 1763. The siege of Fort Pitt lasted for two months. Pontiac's warriors kept up a continuous, though ineffective, fire on it. Then they drew off to meet the relieving party under Colonel Bouquet, which defeated the Indians in the Battle of Bushy Run. This victory sealed British dominion over the forks of the Ohio, if not the entire Ohio valley. In 1764 Colonel Bouquet added a redoubt, the "Block House," which still stands, the sole remaining structure from Fort Pitt and the oldest authenticated building west of the Allegheny Mountains.

The Iroquois signed the Fort Stanwix Treaty of 1768, ceding the lands south of the Ohio to the British. European expansion into the upper Ohio valley increased. An estimated 4,000 to 5,000 families settled in western Pennsylvania between 1768 and 1770.Of these settlers, about a third were English, a third were Scotch-Irish and the rest were Welsh, German and others. These groups tended to settle together in small farming communities, but often their households were not within hailing distance. The life of a settler family was one of relentless hard work: clearing the forest, stumping the fields, building cabins and barns, planting, weeding and harvesting. In addition, almost everything had to be manufactured by hand, including furniture, tools, candles, buttons and needles. Settlers had to deal with harsh winters, and with snakes, black bears, mountain lions and timber wolves. Because of the fear of raids by Native Americans, the settlers often built their cabins near, or even on top of, springs. They also built blockhouses, where neighbors would rally during conflicts.

Increasing violence with the Shawnee, Miami, and Wyandot tribes lead to Dunmore's War in 1774, and conflict with Native Americans continued throughout the American Revolution. In 1777, Fort Pitt became a United States fort, when Brigadier General Edward Hand took command. In 1779, Colonel Daniel Brodhead led 600 men from Fort Pitt to destroy Seneca villages along the upper Allegheny.

In 1780 Virginia and Pennsylvania came to an agreement on their mutual borders, creating the state lines known today and determining finally that the Pittsburgh region was Pennsylvanian. In 1783, the Revolutionary War ended, which also brought at least a temporary cessation of border warfare. In the 1784 Treaty of Fort Stanwix, the Iroquois ceded the land north of the Purchase Line to Pennsylvania.

Pittsburgh in 1790. The hill east of the village is Grant's Hill, which was cut in 1836, 1847 and 1913–14.

Map of Pittsburgh in 1795

After the Revolution, the village of Pittsburgh continued to grow. One of its earliest industries was boat building. With its strategic location at the mouth of the Ohio, and plentiful timber close by, Pittsburgh was well-situated for the building of flatboats, used by settlers to reach the Ohio country, and for farmers to send their products down river, sometimes as far as New Orleans. Often these boats would be broken up at their destination and used for construction materials. Prior to steam power, the up-river journey, by poling, rowing and pulling, was slow and expensive, but long, narrow keelboats were built for the purpose.

The village began to develop vital institutions. Hugh Henry Brackenridge, a Pittsburgh resident and state legislator, introduced a bill that resulted in a gift deed of land and a charter for the Pittsburgh Academy in 1787. The Academy later became the University of Western Pennsylvania (1819) and the University of Pittsburgh (1908).

Many farmers distilled their corn harvest into whiskey, increasing its value while lowering its transportation costs. When the federal government imposed an excise tax on whiskey, farmers felt victimized, leading to the Whiskey Rebellion in 1794. Farmers from the region rallied at Braddock's Field and marched on Pittsburgh. The short-lived rebellion was put down, however, when President George Washington sent in militias from several states.

The town continued to grow in manufacturing capability. In 1792, the boatyards in Pittsburgh built a sloop, Western Experiment. During the next decades, the yards produced other large boats. By the 1800s, they were building ocean-going vessels that shipped goods as far as Europe. In 1794, the town's first courthouse, a wooden structure on Market Square, was built. In 1797, the manufacture of glass began.

Year	City Population
1761	332
1796	1,300
1800	1,565

The Iron City (1800–1859)

Second Court House, completed 1841

Commerce continued to be an essential part of the economy of early Pittsburgh, but increasingly, manufacture began to grow in importance. Pittsburgh sat in the middle of one of the most productive coalfields in the country; the region was also rich in petroleum, natural gas, lumber and farm goods. Also, the early settlers were accustomed to manufacturing everything they needed. Blacksmiths forged iron implements, from horse shoes to nails. By 1800, the town, with a population of 1,565 persons, had over 60 shops, including general stores, bakeries, and hat and shoe shops.

The 1810s were a critical decade in Pittsburgh's growth. In 1811, the first steamboat was built in Pittsburgh. Increasingly, commerce would also flow upriver. The War of 1812 was catalytic in the growth of the Iron City. The war with Britain, the manufacturing center of the world, cut off the supply of British goods, stimulating American manufacture. Also, the British blockade of the American coast increased inland trade, so that goods flowed through Pittsburgh from all four directions. By 1815, Pittsburgh was producing $764K in iron; $249K in brass and tin, and $235K in glass products. When, on March 18, 1816, Pittsburgh was incorporated as a city, it had already taken on some of its defining characteristics: commerce, manufacture, and a constant cloud of coal dust.

Other emerging towns challenged Pittsburgh. In 1818, the first segment of the National Road was completed, from Baltimore to Wheeling, bypassing Pittsburgh. This threatened to render the town less essential in east-west commerce. In the coming decade, however, many improvements were made to the transportation infrastructure. In 1818, the region's first river bridge, the Smithfield Street Bridge, opened, the first step in building the city of bridges. In 1820, the original Pennsylvania Turnpike was completed, connecting Pittsburgh and Philadelphia. In 1829, the Pennsylvania Main Line Canal began operations. Now Pittsburgh was part of a transportation system that included rivers, roads and canals.

Manufacture continued to grow. In 1835, McClurg, Wade and Co. built the first locomotive west of the Alleghenies. Already, Pittsburgh was capable of manufacturing the most essential machines of its age. By the 1840s, Pittsburgh was not a town, but one of the largest cities west of the mountains. In 1841, the Second Court House, on Grant's Hill, was completed. Made from polished gray sandstone, the court house had a rotunda 60 feet in diameter and 80 feet high.

Like many burgeoning cities of its day, Pittsburgh's growth outstripped some of its necessary infrastructure, such as a water supply with dependable pressure. Because of this, on April 10, 1845, a great fire burned out of control, destroying over a thousand buildings and causing $9M in damages. As the city rebuilt, the age of rails arrived. In 1851, the Ohio and Pennsylvania Railroad began service between Cleveland and Allegheny City (present-day North Side). In 1854, the Pennsylvania Railroad began service between Pittsburgh and Philadelphia.

Despite many challenges, Pittsburgh had grown into an industrial powerhouse. An 1857 article provided a snapshot of the Iron City:

• 939 factories in Pittsburgh and Allegheny City
  • employing more than 10 K workers
  • producing almost $12M in goods
  • using 400 steam engines
• Total coal consumed - 22M bushels
• Total iron consumed - 127 K tons
• In steam tonnage, third busiest port in the nation, surpassed only by New York City and New Orleans, Louisiana.

Monongahela River Scene, 1857.

Year	City Population	City Rank [1]
1800	1,565	NA
1810	4,768	31
1820	7,248	23
1830	12,568	17
1840	21,115	17
1850	46,601	13
1860	49,221	17

The Steel City (1859–1946)

Pittsburgh in 1874. Birmingham is in the foreground, and Allegheny City in background across the Allegheny.

During the mid-1800s, Pittsburgh witnessed a dramatic influx of German immigrants, including a brick mason whose son, Henry J. Heinz, founded the H.J. Heinz Company in 1872. Heinz was at the forefront of reform efforts to improve food purity, working conditions, hours and wages.

The iron industry in Pittsburgh was thriving. In 1859, the Clinton and Soho iron furnaces introduced coke-fire smelting to the region. The American Civil War boosted the city's economy with increased production of iron and armaments, especially at the Allegheny Arsenal and the Fort Pitt Foundry. Arms manufacture included iron-clad warships and the world's first 21" gun. By war's end, over one-half of the steel and more than one-third of all U.S. glass was produced in Pittsburgh. A milestone in steel production was achieved in 1875, when the Edgar Thomson Works in Braddock began to make steel rail using the new Bessemer process.

Industrialists such as Andrew Carnegie, Henry Clay Frick, Andrew W. Mellon, and Charles M. Schwab built their fortunes here. George Westinghouse, credited with such advancements as the railroad air brake and alternating current, founded over 60 companies in Pittsburgh, including Westinghouse Air and Brake Company (1869), Union Switch & Signal (1883), and Westinghouse Electric Company (1886). Banks played a key role in Pittsburgh's development as these industrialists sought massive loans to upgrade plants, integrate industries and fund technological advances. For example, T. Mellon & Sons Bank, founded in 1869, helped finance an aluminium reduction company that became Alcoa.

Burning of Pennsylvania Railroad and Union Depot, Pittsburgh, 21–22 July 1877

Labor violence

As a manufacturing center, Pittsburgh also became an arena for intense labor strife. In 1877, the great railroad strike led to extensive rioting. Dozens were killed and over 40 buildings were burned down, including the Union Depot of the Pennsylvania Railroad. Fifteen years later, in 1892, another violent confrontation episode in labor relations resulted in 10 deaths when strikers killed Pinkertons sent by Carnegie Steel Company's manager Henry Clay Frick sent in to protect the mill during the Homestead Strike.

Krause (1992) argues the "Battle for Homestead" in Pittsburgh in 1892 represented a struggle between two competing, contradictory, and irreconcilable versions of American Republicanism. One was Andrew Carnegie's belief in the inalienable right to private property and the right to accumulate capital and manage enterprise. Individual entrepreneurship was the republican way to wealth for the individual and for society as a whole. In opposition was the version personified by labour reformer Thomas 'Beeswax' Taylor, which saw in the ideology of republicanism the guarantee of the workers' right to dignity and security as a group. The strikers' republicanism viewed labor as the inalienable property of the individual worker, rejected the "law" of supply and demand and sought the group action by unions to assert the rights. They were not socialists and did not want government ownership, but they did want to control the work patterns on the factory floor regardless of the owner and his foremen. The unions were still thinking in terms of iron, when their expertise was decisive. In the age of steel the white collar engineer made the critical decisions, not blue collar workers. The union defeat in 1892 did not simply mark the end of the steelworkers' union's power, it more importantly destroyed the hopes of realizing the aims of radical republicanism. After 1900 Samuel Gompers and the AFL unions worked inside the owners' model of republicanism and sought higher wages, while the rejected republicanism vision was incorporated into the Socialism of Eugene Debs, who argued the workers should have full control by nationalizing industry and having a labor party run the government.

Carnegie's Empire

Andrew Carnegie, a former Pennsylvania Railroad executive turned steel magnate, founded the Carnegie Steel Company. He proceeded to play a key role in the development of the U.S. steel industry. In 1890, he established the first Carnegie Library, and in 1895, the Carnegie Institute. In 1901, as the U.S. Steel Corporation formed, he sold his mills to J.P. Morgan for $250 million, making him one of the world's richest men. He was based primarily in New York City, with only occasional visits to Pittsburgh. In Pittsburgh, he founded the Carnegie Institute of Technology (now Carnegie Mellon University) and the Carnegie Museums of Pittsburgh.

Pittsburgh in 1902

In civic developments, in 1886, the third (and present) Allegheny County Courthouse and Jail was completed. In 1890, trolleys began operations. In 1907, the city had a major flood. Pittsburgh annexed Allegheny City.

By 1911, Pittsburgh had grown into an industrial and commercial powerhouse:

• Nexus of a vast railway system, with freight yards capable of handling 60 K cars
• 27.2 miles of harbor
• Yearly river traffic in excess of 9M tons
• Value of factory products more than $211M (with Allegheny City)
• Allegheny county produced, as percentage of national output, about:
  • 24% of the pig-iron
  • 34% of the Bessemer steel
  • 44% of the open-hearth steel
  • 53% of the crucible steel
  • 24% of the steel rails
  • 59% of the structural shapes

To escape the soot of the city, many of the wealthy lived in the Shadyside and East End neighborhoods, a few miles east of downtown. Fifth Avenue was dubbed "Millionaire's Row" because of the many mansions lining the street. Oakland became the city's predominant cultural and educational center, including four universities, multiple museums, a library, a music hall and a botanical conservatory. Oakland's University of Pittsburgh erected the world's second-tallest educational building, the 42-story Cathedral of Learning. It towered over Forbes Field, where the Pittsburgh Pirates played from 1909–1970.

Downtown Pittsburgh panorama, from 1920.

Between 1870 and 1920, the population of Pittsburgh grew almost sevenfold. Many of the new residents were immigrants who sought employment in the factories and mills and introduced new traditions, languages and cultures to the city. Ethnic neighborhoods emerged on densely populated hillsides and valleys, such as Polish Hill, Bloomfield and Squirrel Hill, home to 28% of the city's almost 21,000 Jewish households. The Strip District, the city's produce distribution center, still boasts many restaurants and clubs that showcase these multicultural traditions of Pittsburghers.

The years 1916–1930 marked the largest migration of African-Americans to Pittsburgh. Known as the cultural nucleus of Black Pittsburgh, Wylie Avenue in the Hill District was an important jazz mecca. Jazz greats such as Duke Ellington and Pittsburgh natives Billy Strayhorn and Earl Hines played here. Two of the Negro League's greatest rivals, the Pittsburgh Crawfords and the Homestead Grays, often competed in the Hill District. The teams dominated the Negro National League in the 1930s and 1940s.

During World War II, Pittsburgh's mills contributed 95 million tons of steel to the Allied war effort.

Steelworker watching molten steel being poured into a mold, J&L Steel, Pittsburgh, May 1942.

Year	City Population	City Rank [2]
1860	49,221	17
1870	86,076	16
1880	156,389	12
1890	238,617	13
1900	321,616	11
1910	533,905	8
1920	588,343	9
1930	669,817	10
1940	671,659	10
1950	676,806	12

Renaissance I (1946–1973)

Three Rivers, in 2000. The multi-purpose stadium was built in 1970 as part of the Renaissance I project. It was imploded in 2001.

Rich and productive, Pittsburgh was also the "Smoky City," with smog sometimes so thick that streetlights burned during the day. Civic leaders, notably Mayor David L. Lawrence, elected in 1945, and Richard K. Mellon, chairman of Mellon Bank, began smoke control and urban revitalization projects that transformed the city. Renaissance I began in 1946. By 1950, the first building project, the Gateway Center, was under construction. 1953 saw the opening of the (since demolished) Greater Pittsburgh Municipal Airport. Ninety-five acres of the lower Hill District were cleared, displacing 1,200 residents, most of them African-American, in order to make room for the Civic Arena, which opened in 1961.

The city's industrial base continued to grow. Jones and Laughlin Steel Company expanded its plant on the Southside. H.J. Heinz, Pittsburgh Plate Glass, Alcoa, Westinghouse, U.S. Steel and its new division, the Pittsburgh Chemical Company and many other companies also continued robust operations through the 1960s. 1970 marked the completion of the final building projects of Renaissance I, the U.S. Steel Tower and Three Rivers Stadium. In 1974, with the addition of the fountain at the tip of the Golden Triangle, Point State Park was completed. The city was revitalized. Air quality was dramatically improved. Pittsburgh's manufacturing base seemed solid. Pittsburgh, however, was about to undergo one of its most dramatic transformations.

Reinvention (1973–present)

"Pittsburgh from Mt. Washington," by Jennifer Yang, December, 2005.

During the 1970s and 1980s, the U.S. steel industry came under increasing pressure from foreign competition. Competition became stronger from Germany and Japan. Foreign mills and factories, built with the latest technology, benefited from lower labor costs and powerful government-corporate partnerships, allowing them to capture increasing market shares of steel and steel products. Separately, demand for steel softened due to recessions, the 1973 oil crisis, and increasing use of other materials. At this critical juncture, free market and anti-union policies, and deregulation, especially under President Reagan, came into play. These pressures only added to the U.S. steel industry's own internal problems, which included a now-outdated manufacturing base that had been over-expanded in the 1950s and 1960s, hostile management and labor relationships, the inflexibility of United Steelworkers regarding wage cuts and work-rule reforms, oligarchic management styles, and poor strategic planning by both union and management. In particular, Pittsburgh faced its own challenges. Local coke and ore deposits were depleted, raising material costs. The large mills in the Pittsburgh region also faced competition from newer, more profitable "mini-mills" and non-union mills with lower labor costs

Beginning in the late 1970s and early 1980s, the steel industry in Pittsburgh began to implode. Following the 1981–1982 recession, for example, the mills laid off 153,000 workers. The steel mills began to shut down. These closures caused a ripple effect, as railroads, mines, and other factories across the region lost business and closed. The local economy suffered a depression, marked by high unemployment and underemployment, as laid-off workers took lower-paying, non-union jobs. Pittsburgh suffered as elsewhere in the Rust Belt with a declining population, and like many other U.S. cities, it also saw sustained middle class movement from cramped old housing to new spacious housing in the suburbs.

Year	City Population	City Rank [3]	Population of the Urbanized Area [4]
1950	676,806	12	1,533,000
1960	604,332	16	1,804,000
1970	540,025	24	1,846,000
1980	423,938	30	1,810,000
1990	369,879	40	1,678,000
2000	334,563	51	1,753,000

Today there are no steel mills in Pittsburgh, although manufacture continues at regional mills, such as the Edgar Thomson Works in near-by Braddock. Beginning in the 1980s, Pittsburgh's economy shifted from heavy industry to services, medicine, higher education, tourism, banking, corporate headquarters and high technology. Today, the top two private employers in the city are the University of Pittsburgh Medical Center (26,000 employees) and the University of Pittsburgh (10,700 employees).

Despite the economic turmoil, civic improvements continued. In 1985, the J & L Steel Southside site was cleared and a High Technology Center was built. In the 1980s, the Renaissance II urban revitalization created numerous new structures, such as PPG Place. In the 1990s, the former sites of the Homestead, Duquesne and South Side US Steel mills were cleared. In 1992, the new terminal at Pittsburgh International Airport opened. In 2001, Heinz Field and PNC Park opened.

Following these transformations, present-day Pittsburgh, with clean air, a diversified economy, a low cost of living, and a rich infrastructure for education and culture, has been ranked as one of the World's Most Livable Cities.

Further reading

For a more detailed guide see the bibliography

• Baldwin, Leland D. Pittsburgh: The Story of a City. Pittsburgh: University of Pittsburgh Press, 1937.
• Hays, Samuel P., ed. City at the Point: Essays on the Social History of Pittsburgh. Pittsburgh: University of Pittsburgh Press, 1989.
• Lorant, Stefan. Pittsburgh: The Story of an American City. (1999), well written, heavily illustrated popular history
• Lubove, Roy, ed. Pittsburgh 1976.
• Smith, Arthur G. Pittsburgh: Then and Now. Pittsburgh: University of Pittsburgh Press, 1990.

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