Neoclassical (1797 hotel), Vernacular (1815 academy)[3] Federal (1815 house), Greek Revival (1837 "edifice"), Italianate (1855 gatehouse),[4] Gothic Revival (1862 home), Queen Anne (1883 house) Romanesque (1889 hall), Castellated tower (1889 monument) Box truss (1895 observatory Beaux-Arts (1906 bank)[3] Parkitecture (1933 station),[5][6]: '33 Art deco (1938 armory) The Gettysburg Battlefield Historic District is a district of contributing properties and over 1000 historic contributing structures and 315 historic buildings, located in Adams County, Pennsylvania.

Contributing structures include postbellum artifacts such as the 1895 Big Round Top Observation Tower Foundation Ruin, the 1893 Electric Trolley Bed, and the only remaining Tipton Boundary Marker.

Notable antebellum structures that no longer exist include the 1761[9] Samuel Gettys tavern, as well as the c. 1790 McAllister Mill along Rock Creek used by the Underground Railroad.

[11] The c. 1795 pub (Quinn's 1859 "Railroad Store",[12] 1924 Mitchell's Restaurant)[11] on the northeast of the center square subsequently burned and has been restored.

Official groupings of historical real estate tracts began with the 1864 Gettysburg Battlefield Memorial Association era, and continued with the initial United States Department of War acquisitions in 1893.