Astronomy tower of the Sorbonne
5th arrondissement of Paris, France · built 1885
The Astronomy Tower of the Sorbonne is a tower at the Sorbonne University's Paris campus built to house an astronomical observatory for its students. The structure was erected during the reconstruction of the Sorbonne, between 1885 and 1901. The tower is 39 meters high, has an upper and lower dome, and includes several rooms. The upper dome houses the telescope, and the lower dome contains an optics workshop for amateurs to make mirrors (previously, a meridian circle was installed in that space). The tower is operated by the Société astronomique de France and is available for tours and amateur observations.
Observatory data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).