The Colonial Revival was a nationalistic architectural style that was popular in the United States from the end of the 19th century through the 1930s. Attempting to emulate and recall the designs of America's early history, the Colonial Revival stemmed from the restorations of the mid-19th century at Independence Hall, Mount Vernon, and Washington's headquarters at Newburgh as well as a newly founded sense of patriotism originating out of the 1876 Centennial celebration in Philadelphia. A popular style for residential architecture, the Colonial Revival took its precedents from the Georgian and Neoclassical architecture of the East Coast and England, roughly from 1720 to 1840, as well as Greek Revival influences, with defining characteristics such as symmetrical wood clapboard or Flemish-bond brick facades with elaborate front doors, crown or broken pediment entrances, fanlights, Palladian windows, gabled or mansard roofs, Classical-inspired details such as swag reliefs and urns, and dormer windows.