The following is a timeline of the history of the city of Pittsburgh, Pennsylvania, US.
18th century
1742
John Fraser is given what will become Braddock's Field. 1754 January: Construction on Fort Prince George is started April 18: Fort Prince George is surrendered. April: Fort Duquesne established by French. 1755 July 9: French and Indian forces defeat the British Army. 1758 September 14: The Battle of Fort Duquesne takes place November 25: British take Fort Duquesne, rename it Pittsburgh (variously spelled). 1760 Population: 464. 1763 June 22: Siege of Fort Pitt begins August 20: Siege of Fort Pitt ends 1764 The Fort Pitt Blockhouse is completed. 1768 November 5: Fort Pitt is annexed into Pennsylvania with the signing of the Treaty of Fort Stanwix. 1786 Gazette newspaper begins publication. 1787 Pittsburgh Academy established. 1788 Allegheny County is created from parts of Westmoreland and Washington counties. Allegheny County Sheriff's Office is established. Town of Allegheny is laid out north of Pittsburgh. September 17: Treaty of Fort Pitt is signed. Mechanical Society organized. 1792 Fort Pitt is abandoned by the U.S. Army. Fort Lafayette is established. 1793 September 12: The Pittsburgh Bureau of Fire is established. 1794 Pittsburgh is incorporated as a borough. The Pittsburgh Night Watchmen, the predecessor to the Pittsburgh Police Department is established. August 1: Rebellious militiamen and farmers march on the city during the Whiskey Rebellion 1797 August 3: Fort Pitt is officially decommissioned by the army and is subsequently demolished. 1798 Gilkison Bookstore and Circulating Library in business. 1800 Population: 1,565.
19th century
1800s-1840s
1803
Fort Lafayette serves as a staging base for the Lewis and Clark Expedition. McClurg iron foundry in business. 1810 Eagle Fire Company formed. Population: 4,768. 1811 Pittsburgh Engine Company in business. 1812 Fort Lafayette serves as a supply base for Commodore Oliver Hazard Perry. 1813 Pittsburgh Humane Society and Chemical and Physiological Society established. 1815 Allegheny College is established. 1814 Fort Lafayette is abandoned. Pittsburgh Permanent Library Company established. 1816 March 18: Pittsburgh borough is incorporated as a city. Ebenezer Denny becomes mayor. 1820 Population: 7,248. 1825 Pittsburgh Apprentices' Library founded. 1828 Town of Allegheny incorporated as a borough. City water pumping system put into effect for the Allegheny River. 1829 City wards created: East, North, South, West. Western Division Canal in operation. 1830 Population: 12,542. 1831 Theban Literary Society organized. 1832 African Education Society founded. The Flood of 1832. Cholera outbreak. 1833 Pittsburg Theater built. 1835 Board of Trade created. 1838 Pittsburg Institute of Arts and Sciences incorporated. 1840 Allegheny borough incorporated as a city. Pittsburgh and Beaver Canal opens. 1841 Courthouse built on Grant Street. State Convention of Colored Freemen held in city. 1842 Sitdown strike by iron workers. 1843 Roman Catholic Diocese of Pittsburgh established. 1844 Allegheny Cemetery established. 1845 April 10: Fire. Delany's The Mystery newspaper begins publication. 1846 Uptown becomes part of city. Pittsburgh Dispatch newspaper begins publication. Odeon Hall opens. 1847 Young Men's Mercantile Library & Mechanics Institute established. The Catholic Sisters of Mercy establish Mercy Hospital, the first hospital in Pittsburgh 1849 St. Mary Cemetery established. Horne's in business. Manufacture of "Kier's Rock Oil" begins.