Joseph Vallot and his team of guides and porters climb Mont Blanc in 1906. Their ascent will take three days. They spent their nights at the Grands Mulets refuge and the Grand Plateau refuge. This is the very first successfully filmed ascent. Joseph Vallot (1854-1925), rich heir of Lodève in Occitania. He devotes part of his fortune to the observation of the Alps, sometimes opposing the scientific community. He built an observatory, still standing today.