John D. Rockefeller Jr. Library

The John D. Rockefeller Jr. Library, nicknamed "the Rock", is the primary teaching and research library for the humanities, social sciences, and fine arts at Brown University in Providence, Rhode Island. It is one of five individual libraries which make up the Brown University Library.

The library was named after John D. Rockefeller Jr., who graduated in the class of 1897. The building was constructed between 1962 and 1964 and designed by Danforth Toan. The building drew attention as the first building in the area constructed in the Brutalist style, and alongside the Sciences Library, Graduate Center, and List Art Building, is one of the campus's four significant examples of Brutalist architecture.