John W. Cook Hall, or Cook Hall, is a building which resembles a castle on the Quad of Illinois State University in Normal, Illinois. Cook Hall, named for the university's fourth president, has been listed on the National Register of Historic Places since the winter of 1986. Cook Hall is one of "Altgeld's castles": it was designed toward the end of the administration of Illinois Governor John Peter Altgeld. Altgeld was a German native who favored Gothic Revival architecture.