The History Museum's mission is to collect, preserve, interpret, exhibit and teach the hertiage of the St. Joseph River Valley region. First organizaed in 1867, The History Museum (owned and operated by the Northern Indiana Historical Society) is the second oldest historical society in Indiana. The museum includes:
- Copshaholm, the Oliver Mansion, the 38-room mansion that was once home to the local industrialist J.D. Oliver
- The Worker's Home, reflecting a Polish immigrant family in the 1930s
- Changing Gallery, chronicling local history of the St. Joseph River Valley region
- Ernestine M. Raclin Gallery, featuring history of the University of Notre Dame
- The history of the All-American Girls Professional Baseball League.
- Kidsfirst Children's Museum
- Archives of local history, including the archives of the All-American Girls Professional Baseball League (AAGPBL)
- Educational programs such as guided tours, lectures, film series, children's programs, living history and historical theater
Adjacent to The History Museum is the Studebaker National Museum and together, the two museums comprise The Museums at Washington & Chapin. Visitors can enter one door, buy one ticket and visit two fantastic museums.