The Clarke Observatory is located on the Mount Union College campus in Alliance, Ohio.
Originally built for private use, the observatory was sold to Elmer Harrold, another private owner, who donated to Mount Union College upon the graduation of his daughter from the college. A new observatory was built on campus to house the observatory in 1923 and outfitted with the telescope from the first Clarke Observatory. The second observatory was demolished in 1969 and the telescope moved to a new home attached to East Hall at Mount Union College.
First Observatory
Location: Dunkirk, New YorkConstruction Began: 1897Benefactor: Charles Ezra HequembourgTelescope Mounted: 1897, German equatorialFirst Telescope: George N. Saegmuller 9-inch refractor, 117-inch focal lengthFirst Light: 1897?Dome Material: bronzeDirectors:Charles Ezra Hequembourg, private owner (1897-1907)Mrs. Hequembourg, private owner (1907-1914)Second Observatory
Location: Alliance, OhioConstruction Began: 1923Benefactor: Elmer HarroldTelescope Mounted: ?First Telescope: George N. Saegmuller 9-inch refractor, 117-inch focal length, moved from New YorkDirectors:Elmer Harrold, private owner (1917-1919), donated to Mount Union CollegeThird Observatory
Location: Alliance, OhioConstruction Began: 1969Refinished: 1952, by the Alliance Tool CompanyTelescope Mounted: 1969First Telescope: 9-inch Saegmuller, refurbished with 8.5-inch lens with 135-inch focal length by J. W. Fecker Company of Pittsburgh.Directors:James P. Rodman