
The Firstside portion of Downtown borders the Monongahela River, the historic Mon Wharf and hosts the distinctive PPG Place Gothic-style glass skyscraper complex. Most significantly, the Pittsburgh Cultural Trust is embarking on RiverParc, a four-block mixed-use 'green' community, featuring 700 residential units and multiple towers between 20 and 30 stories. This district contains many theaters and arts venues and is home to a growing residential segment. The Cultural District consists of a 14-block area of downtown along the Allegheny River.

Steel Tower is the tallest at 841ft (256 m). ĭowntown Pittsburgh has 30 skyscrapers, nine of which top 500 feet (150 m). From 1850 to 1860, the black population in Allegheny County dropped from 3,431 to 2,725 as people headed to more safety in Canada. Many slaves left the city and county for Canada after Congress passed the 1850 Fugitive Slave Act, as it required cooperation from law enforcement even in free states and increased penalties. Sometimes refugee slaves from the South stayed in Pittsburgh, but other times they continued North, including into Canada.

The Merchant's Hotel was also a place where African-American workers would advise slaves the state was free and aid them in getting to a nearby stations of the Underground Railroad.

The Drennen Slave Girl walked out of the Monongahela House in 1850, apparently to freedom. There were active stations of the Underground Railroad in the city, and numerous refugees were documented as getting help from station agents and African-American workers in city hotels. While Pennsylvania had been established as a free state after the Revolution, enslaved African Americans sought freedom here through escape as refugees from the South, or occasionally fleeing from travelers they were serving who stayed in the city.
