Old St. Mark's Episcopal Church building is located in Beaver Dam, Wisconsin and was built in 1858. [1] [2] [3] The congregation moved to the present site on East Mill Street in 1978, previously used as a Pentecostal church. Old Saint Mark's, on East Maple at North Lincoln Avenue, now a child care facility, was added to the National Register of Historic Places in 1980. [4] Saint Mark's Church is part of the Episcopal Diocese of Wisconsin. [5]