File:Nassau Hall PU.jpg

English: Nassau Hall (or Old Nassau) is the oldest building at Princeton University in Princeton, Mercer County, New Jersey, United States.[3] At the time it was built in 1756, Nassau Hall was the largest building in colonial New Jersey and the largest academic building in all the American colonies.[4] The University, then known as the College of New Jersey, held classes for one year in Elizabeth and nine years in Newark before the Hall was completed in 1756. Designed originally by Robert Smith, the building was subsequently remodeled by notable American architects Benjamin Latrobe and John Notman. In the early years of Princeton University, Nassau Hall accommodated classrooms, a library, a chapel, and residential space for students and faculty. It housed the university's first Department of Psychology, for example.

During the events of the American Revolutionary War, Nassau Hall was possessed by both British and American forces and suffered considerable damage, especially during the Battle of Princeton on January 3, 1777. From July to October 1783, Princeton was the capital of the early United States and Nassau Hall hosted the entire American government. The Congress of the Confederation met in the building's library on the second floor. According to Princeton University, "Here Congress congratulated George Washington on his successful termination of the war, received the news of the signing of the definitive treaty of peace with Great Britain, and welcomed the first foreign minister—from the Netherlands—accredited to the United States."[5]

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