The Old Lighthouse Museum is the most historic structure left in Michigan City

The building was constructed in 1858 by the U.S. government to provide navigation aid to ships on Lake Michigan. Over the years Michigan City’s beacon became known as “Old Faithful” because of the conscientious services of its lighthouse keepers.
The most famous of these lighthouse keepers was Harriet Colfax, who worked for 43 years until her retirement in 1904. Extensively remodeled in 1904, the lighthouse served exclusively as quarters for the keeper and his assistant; the beacon light had been moved to the pier lighthouse in the late 1880’s.
The Coast Guard took over the lighthouse service after the death of the last lighthouse keeper in 1940. In 1965, the Michigan City Historical Society leased the building from the city, restoring and establishing a museum in the lighthouse. The Old Lighthouse Museum is open to the public for tours.