Due to refurbishings in the Victorian style after the Louisiana Purchase, only a handful of buildings in the French Quarter preserve their original colonial French or Spanish architectural styles, concentrated mainly around the cathedral and Chartres Street. Most of the 2,900 buildings in the Quarter are either of "second generation" Creole or Greek revival styles. Fires in 1788 and 1794 destroyed most of the original French colonial buildings, that is, "first generation" Creole. They were generally raised homes with wooden galleries, the only extant example being Madame John's Legacy at 632 Dumaine Street, built during the Spanish period in 1788. The Ursuline Convent (1745–1752) is the last intact example of French colonial architecture. Of the structures built during the French or Spanish colonial eras, only some 25 survive to this day (including the Cabildo and the Presbytère), in a mixture of colonial Spanish and neo-classical styles.