The Haan Mansion Museum of Indiana Art is a public museum in Lafayette, Indiana, housing the largest collection of Indiana art anywhere in the world. The museum is located in the Potter-Haan Mansion at 920 E State Street. The museum's collection includes over 100 paintings by Hoosier Group, Indiana Regionalism artists as well as ceramics, antique furniture and decorative items. The museum is a member of American Alliance of Museums. The museum is based on the private collection of Robert (Bob) and Ellen (Ellie) Haan, the founders and former owners of Haan Crafts Corporation.