Mont Blanc massif less than 21 hours. The main mountain passes, or cols, that connect different valleys and towns around the Mont Blanc massif are: The first ascent of Mont Blanc in 1786 by Jacques Balmat and Michel Paccard initiated the sport of alpine mountaineering, and it was during the golden age of alpinism (185465) and the silver age of alpinism (186582) that the majority of the main summits of the massif were first attained. Members of the England-based Alpine Club were instrumental in many of the first ascents, usually accompanied by guides from the towns of Chamonix or Courmayeur, such as Michel
Jacques Gabriel of de Cotte's retirement in December 1734 and held the post until he was succeeded by his "vastly more gifted" son, Ange-Jacques Gabriel in 1742. Gabriel's work in Paris has been much remodelled. Mariette's "Architecture françoise" offers plates illustrating several "hôtels particuliers" by Gabriel. He completed the Palais Bourbon (begun by Giardini, continued by Pierre Cailleteau Lassurance). He completed the Hôtel de Lassay nearby. He was responsible for the Hôtel Peyrenc de Moras (de Biron), 1728-31. "Il étoit expert dans la conduite du bâtiment, mais il n'auroit pas pu dessiner le moindre bout d'ornement"; ). Jacques Gabriel Jacques Gabriel (1667–1742)