Mines Paris – PSL, officially École nationale supérieure des mines de Paris (until May 2022 Mines ParisTech, also known as École des mines de Paris, ENSMP, Mines de Paris, les Mines, or Paris School of Mines), is a French grande école and a constituent college of PSL Research University. It was originally established in 1783 by King Louis XVI. Mines Paris is distinguished for the outstanding performance of its research centers and the quality of its international partnerships with other prestigious universities in the world, which include Massachusetts Institute of Technology (MIT), California Institute of Technology (Caltech), Harvard John A. Paulson School of Engineering and Applied Sciences (Harvard SEAS), Shanghai Jiao Tong University, University of Hong Kong, National University of Singapore (NUS), Novosibirsk State University, Pontifical Catholic University of Chile, and Tokyo Tech. Mines Paris also publishes a world university ranking based on the number of alumni holding the post of CEO in one of the 500 largest companies in the world: the Mines ParisTech: Professional Ranking of World Universities. The school is a member of the ParisTech (Paris Institute of Technology) alliance. A school of mining had been proposed by Henri Bertin in 1765 but it was the chemist Balthazar-Georges Sage who, though not a chemist of repute, was a royalist who was able to influence Jacques Necker (1732–1804) of the value of mineralogy in training students in mining. This was achieved through the use of his own large collections of minerals, and a chair in mineralogy was established on July 11, 1778. The school of mines was begun at the mint, the Hôtel de la Monnaie, Paris. The school was officially opened by decree of the French King's Counsel on March 19, 1783. The school disappeared at the beginning of the French Revolution but was re-established by decree of the Committee of Public Safety in 1794, the 13th Messidor Year II. It moved to Savoie, after a decree of the consuls the 23rd Pluviôse Year X (1802).