Mont Blanc massif led to calls to limit access to the most popular summits and for the mountains to be treated with greater respect. The Mont Blanc massif has provided numerous opportunities for academic research, dating back to the very first ascent of Mont Blanc in 1786 during which Michel Paccard carried scientific equipment to confirm it as the highest summit. In 1820, an ill-fated expedition led by Dr Hamel included pigeons intended for release at varying altitudes to measure the impact of reduced air density on their ability to fly. In 1890, Joseph Vallot built a small meteorological observatory at approximately between
Ange-Jacques Gabriel monumental buildings, as he did in the Place de la Concorde. Ange-Jacques Gabriel Ange-Jacques Gabriel (23 October 1698 – 4 January 1782) was the principal architect of King Louis XV of France. His major works included the Place de la Concorde, the École Militaire, and the Petit Trianon and opera theater at the Palace of Versailles. His style was a careful balance between French Baroque architecture and French neoclassicism. Ange-Jacques Gabriel was born on October 23, 1698 to a famous Parisian family of architects, and was connected by marriage with another celebrated architect of the time, François Mansart. His grandfather