The Neuchâtel Cantonal Observatory lived from 1858 to 2007. What was its role? In a video produced for the Federation of the Swiss Watch Industry, Gaetano Mileti, deputy director of the Laboratoire Temps-Fréquence at the University of Neuchâtel, and Julien Gressot, a doctoral student in the SNSF project, tell the story of this important place in the history of Neuchâtel.