Why it belongs here
The Côte d'Azur Observatory (French: Observatoire de la Côte d'Azur, pronounced [ɔpsɛʁvatwaʁ də la kot dazyʁ], OCA) is a network of astronomical observatories throughout southern France (Alpes-Maritimes district). It originated in 1988 with the merger of two observatories: Nice Observatory Centre de recherches en géodynamique et astrométrie (CERGA) Cote d'Azur Observatory tested beam combining technology at CHARA array.
Source-backed