Observatoire de Paris and Meudon

Founded in the 17th century, the Observatoire de Paris is one of the oldest astronomical centres in the world. Located in the 14th arrondissement, it has embodied for centuries a place of scientific excellence where major chapters in the history of astronomy have been written.

A few kilometres away, on the heights of Hauts-de-Seine, the Observatoire de Meudon completes this exceptional ensemble with a site inaugurated at the end of the 19th century. Dominated by its famous great dome, it offers sweeping views over the capital and still hosts research activities today.
Together, these two sites form a unique ensemble dedicated to understanding the Universe and sharing knowledge with the general public.

A remarkable scientific and architectural heritage

In Paris, during open days and special events, you can discover a historic building designed under Louis XIV, a true symbol of the birth of modern astronomy. Observation rooms, ancient instruments and meridian lines bear witness to the first major scientific advances.

In Meudon, the atmosphere changes: the estate stretches across a vast wooded park, where spectacular domes house historic telescopes. The impressive Grande Lunette, long one of the largest in the world, still fascinates visitors today with its scale and its role in astronomical discoveries.
These sites therefore combine heritage and active research, bridging scientific legacy and contemporary exploration.

Visits that take you behind the scenes of research

The Paris and Meudon observatories offer guided tours during recurring and exceptional events. In Meudon, during the Science Festival in October, and in Paris, for the European Heritage Days in September, visitors can access areas that are usually closed to the public.

Discover historic buildings, learn more about observation instruments and step into the world of astronomers. These tours offer a rare opportunity to understand how scientists study stars, planets and galaxies.
Virtual tours are also available on the 350ans platform, allowing visitors to explore online the buildings, instruments and places that have shaped more than three centuries of astronomical research.

Whether you are passionate about astronomy or simply curious, these two observatories are must-see destinations in Paris Region. Blending history, science and wonder, they offer a deeper understanding of our place in the Universe.