History: - May 24, 1937: opening Palais de la Decouverte for the Paris World's Fair: the planetarium was at 250m at SW (on the banks of the Seine)
- 11 November 1937: stored in the basement of the CNAM at the end of the 1937 Paris World's Fair - 27 June 1952: 23.5m in the Palais de la Decouverte (Hall d'Antin), same Zeiss II
- 19 April 1979: last session (see 3223)
- November 1979: new dome to the first floor: 15m/201s/Zeiss RFP-DP