Tour Philippe le Bon : visite de la Salle d’Astronomie

Every lunchtime, the Sun winks at the meridian.

From 1783 to 1940, the Tour Philippe le Bon was an astronomical observatory. One of the 11 largest in Europe, it was equipped with the finest instruments. It is even suspected that the Tower was built for astronomical observations in the time of Philip the Good, when the Court of Burgundy was one of the most radiant in Europe.
The visit, twice as long as a traditional ascent of the Tower, takes place in two stages. The first is to watch a ray of sunlight land on the 18th-century meridian, which is still visible, at around 12.40pm. Why 12:40? Why around 12.40 and not at 12.40?

Then, the guide from the Société Astronomique de Bourgogne will tell you all about the observatory, a story full of twists and turns, from the Middle Ages to the Occupation, via the Enlightenment, between science and fascinating characters. There will be projections, experiments and observations, while you wait for the real instruments that once worked there to be reinstalled upstairs.
Note: this tour is not recommended for pregnant women or people with mobility problems (316 steps).

All visitors must be registered regardless of age. Children under 3 can be registered at the lowest rate available.
Children must be accompanied by an adult during the activity. Adults and children in possession of a ticket.
"As part of the Vigipirate plan and for security reasons, no personal belongings may be kept at reception or at the foot of the Philippe Le Bon Tower (luggage, pushchairs, etc.).
We invite you to make your arrangements before the start of the tour.


  • Guided tours
  • Culture and tradition
  • Leisure and sciences
  • Culturel
  • History
  • Astronomy


- 23/03 from 12 noon to 1.30 pm
- 13/04 from 1pm to 2.30pm
- 25/05 from 1pm to 2.30pm
- 22/06 from 1pm to 2.30pm
- 06/07 from 1pm to 2.30pm
- 24/08 from 1pm to 2.30pm
- 21/09 from 1pm to 2.30pm
- 26/10 from 1pm to 2.30pm
- 22/11 from 12h to 13h30
- 21/12 from 12h to 13h30

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Tour Philippe le Bon

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