Nassau Hall is a historic building located on the campus of Princeton University in Princeton, New Jersey. Completed in 1756, it is the oldest building at the university and serves as a symbol of its rich history. The building has been used for various purposes over the years, including classrooms, administrative offices, and even as a temporary capital of the United States during the Revolutionary War. Architecturally, Nassau Hall features a Georgian style with a distinctive clock tower. It is a central part of the university's campus and is often a focal point for students and visitors. The building is named after the House of Nassau, the family of William III of England, who played a significant role in the university's founding.