The John Hay Library (known colloquially as the Hay) is the second oldest library on the campus of Brown University in Providence, Rhode Island, United States. It is located on Prospect Street opposite the Van Wickle Gates. After its construction in 1910, the Hay Library became the main library building on campus, replacing the building now known as Robinson Hall. Today, the John Hay Library is one of five individual libraries that make up the University Library. The Hay houses the University Library's rare books and manuscripts, the University Archives, and the Library's special collections.