At the time of the Gotha meeting in which Lalande took part, there were several private observatories in Paris. But the main places devoted to official astronomy were the Observatoire de Paris, the Observatoire de la Marine and the Observatoire de l'Ecole militaire. Despite the Révolution française in 1789, followed by difficult years, important works were performed in these institutions, the main one - as considered from the international point of view - being the establishement of the Système métrique décimal. Consideration was given to the astronomical activity in Paris around 1800.
Suzanne Débarbat: Parisian astronomy at the time of the Gotha meeting. In: Peter Brosche, Wolfgang R. Dick, Oliver Schwarz, Roland Wielen (Eds.): The Message of the Angles - Astrometry from 1798 to 1998. Proceedings of the International Spring Meeting of the Astronomische Gesellschaft, Gotha, May 11-15, 1998. (Acta Historica Astronomiae ; 3). Thun ; Frankfurt am Main : Deutsch, 1998, p. 31-42.
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