Oldest continuously occupied street in the U.S.: Elfreth's Alley, since 1713.
First art school and art museum: Pennsylvania Academy of the Fine Arts, founded 1805.
Oldest theater in continuous use in the English-speaking world: Walnut Street Theater, since 1809.
First orchestra to appear in a motion picture (1937), on television (1948) and to tour China (1973): Philadelphia Orchestra.
First city to guarantee religious freedom, beginning in 1682.
First African-American church: Mother Bethel A.M.E. Church, established 1794.
First zoo in America: Philadelphia Zoo, chartered in 1859 and opened in 1874.
First July 4th event: 1776. Still a big celebration every year with the 10-day Wawa Welcome America! festival.
First Thanksgiving Day Parade: 1919.
First botanical garden: Bartram's Garden, opened 1728.
First stock exchange: Philadelphia Stock Exchange, 1790.
First
international-style skyscraper: Loews Philadelphia Hotel (12th &
Market Streets), formerly the PSFS (bank) Building, 1932. This was also
the first totally air-conditioned building in America.
First and oldest hospital in America: Pennsylvania Hospital, opened 1751.
First
World's Fair in America: the Centennial International Exhibition, 1876.
Memorial Hall, built especially for the World's Fair, houses the
Please Touch Museum.
First American
convention: the Constitutional Convention of 1787, where the
Constitution of the United States was written and adopted by
representatives of the 13 original colonies.
First American university: The University of Pennsylvania assumed university status in 1779.
First
library: The Library Company of Philadelphia, founded by Benjamin
Franklin in 1731; its current location, 1314 Locust Street, is open to
the public.
First U. S. Mint: established in 1792 on
Seventh Street, near Arch Street, it was the first property acquired by
the federal government.