One of the few surviving residential works of Louis Sullivan, the Charnley-Persky House Museum is a historic piece of Chicago architecture. Sullivan built the house in 1892 along with assistance from Frank Lloyd Wright, and it has since been restored and opened as a museum. Located on the historic Astor Street, the Charnley-Persky House was designated as a National Historic Landmark in 1998 and is recognized as an important work of American architecture. It offers tours of its interior by appointment. The Charnley-Persky House is a popular attraction for anyone interested in Chicago’s decorated architecture history.