Federal-style architecture is the name for the classicizing architecture built in the newly founded United States between c. 1780 and 1830, and particularly from 1785 to 1815. This style shares its name with its era, the Federal Period. The name Federal style is also used in association with furniture design in the United States of the same time period. The style broadly corresponds to the classicism of Biedermeier style in the German-speaking lands, Regency architecture in Britain and to the French Empire style.
In the early American republic, the founding generation consciously chose to associate the nation with the ancient democracies of Greece and the republican values of Rome. Grecian aspirations informed the Greek Revival, lasting into the 1850s. Using Roman architectural vocabulary, the Federal style applied to the balanced and symmetrical version of Georgian architecture that had been practiced in the American colonies' new motifs of neoclassical architecture as it was epitomized in Britain by Robert Adam, who published his designs in 1792.
American Federal architecture typically uses plain surfaces with attenuated detail, usually isolated in panels, tablets, and friezes. It also had a flatter, smoother façade and rarely used pilasters. It was most influenced by the interpretation of ancient Roman architecture, fashionable after the unearthing of Pompeii and Herculaneum. The bald eagle was a common symbol used in this style, with the ellipse a frequent architectural motif.
The classicizing manner of constructions and town planning undertaken by the federal government was expressed in federal projects of lighthouses, harbor buildings, and hospitals. It can be seen in the rationalizing, urbanistic layout of L'Enfant Plan of Washington and in the Commissioners' Plan of 1811 in New York.
This American neoclassical high style was the idiom of America's first professional architects, such as Charles Bulfinch and Minard Lafever. Robert Adam and James Adam were leading influences through their books.
In Salem, Massachusetts, there are numerous examples of American colonial architecture and Federal architecture in two historic districts: Chestnut Street District, which is part of the Samuel McIntire Historic District containing 407 buildings, and the Salem Maritime National Historic Site, consisting of 12 historic structures and about 9 acres (4 ha) of land along the waterfront.