Ritter Observatory was created in 1967.
Ritter Blaubart was created in 1920.
Ritter House was created in 1796.
Ritter Toggenburg was created in 1797.
Ritter Pázmán was created in 1892.
Haleakala Observatory was created in 1961.
Dearborn Observatory was created in 1889.
Kiso Observatory was created in 1974.
Stellafane Observatory was created in 1924.
Steward Observatory was created in 1916.
Union Observatory was created in 1903.
Erbil Observatory was created in 1973.
Sherwood Observatory was created in 1970.