The Calvinistic Congregational Church is an historic church building located at 820 Main Street in Fitchburg, Massachusetts. In 1967, the congregation joined with the First United Methodist Church of Fitchburg to form a cooperative ministry called Faith United Parish. Built in 1896. the church was designed by architect Henry M. Francis, and is one of the city's finest examples of Richardsonian Romanesque architecture. It was added to the National Register of Historic Places in 1979. Since 2013 the building has been owned by the Casa De Gracia y Restauración (House of Grace and Restoration).