 At that time, there were only 3 planetariums in France using Evans & Sutherland's Digistar II fisheye (Vaulx-en-Velin, Pleumeur-Bodou and Toulouse), and Saint-Étienne experimenting with multi-video projectors.Nantes is the first planetarium in the world, to install five video projectors (to cover the entire vault) DLP type in a medium dome.Since the 1990s, some pioneers have been developing digital installations to replace opto-mechanical star projectors.