Observatoire de Paris

61 avenue de l'Observatoire - 75014 Paris

Montparnasse - Alésia - 14e Arrondissement

What's on?

Due to work on the sites in Paris and Meudon, visits to these two sites are suspended. The resumption of visits will be announced as soon as a fixed deadline has been decided. The garden of the Observatory remains open. See opening hours on


Historic building. Old and modern astronomical instruments. The oldest observatory still in operation. (Architect: Claude Perrault 1667-1672). Research and teaching establishment. The Paris observatory is the origin point of the meridian in France, geodisic meridian (1729-Jacques Cassini) that crosses the country from Dunkerque to Perpignan (meridian used for the first map of France). It was in 1884 that an international convention adopted the meridian of Greenwich as the meridian of origin.

Architectural style

  • Classique


  • Astronomie
  • Sciences

Epoque des collections

  • Baroque (XVIe - XVIIe)

Entrance fees and modalities


Open and free entrance for everyone during two annual events: European heritage days (in September) and the Fête de la Science (in October).

Closing times

Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday

Voir la carte

Observatoire de Paris

61 avenue de l'Observatoire
75014 Paris
Tel.. +33 (0) 1 40 51 22 21

  • Subway - Denfert-Rochereau
  • RER - Port-Royal
  • Bus - 38

Monument in the same district: Montparnasse - Alésia

Monument in the same arrondissement: 14th arrondissement

Monument in Paris and in the Paris Region: Monument

Book your activity

see more offers