Height: 267 feet from the ground to the tip of the finial above the dome.
Length: 420 feet, 2 inches
Width: 273 feet, 11 inches
Perimeter: 1,520 feet
Area: 1 and 1/6 acres
Construction Period: Six years (from the summer of 1872 until September 26, 1878). The building was dedicated on January 1, 1879.
Restoration Period: Three years, from 1989 through 1992. The building was rededicated on November 19, 1992.
National Historic Landmark: In 1992 the National Park Service designated the Capitol a National Historic Landmark, an award reserved for America's most important historic places. To qualify, a site must possess exceptional historical, architectural or artistic significance for the nation as a whole.