Gotha Observatory was created in 1787.
Saxe-Gotha was created in 1640.
Saxe-Gotha-Altenburg was created in 1680.
Almanach de Gotha was created in 1763.
Morris Observatory was created in 1973.
Macfarlane Observatory was created in 1757.
Moore Observatory was created in 1978.
Behlen Observatory was created in 1972.
Jura Observatory was created in 1993.
Detroit Observatory was created in 1854.
Sphinx Observatory was created in 1937.
Armagh Observatory was created in 1789.
RIT Observatory was created in 1992.