High Quality Content by WIKIPEDIA articles! Congress Hall is a building near the intersection of Chestnut and 6th Streets in Philadelphia, Pennsylvania that served as the seat of the United States Congress from December 6, 1790 to May 14, 1800. During Congress Hall`s duration as the capitol of the United States, the country admitted three new states, Vermont, Kentucky, and Tennessee; ratified the Bill of Rights of the United States Constitution; and oversaw the Presidential inaugurations of both George Washington (his second) and John Adams.