 His legacy includes the creation of the École militaire, of which he was the first Intendant.From 1760 he protected and financed Pierre Beaumarchais, whom he introduced to the business world in exchange for favours at Court and for commercial and financial missions.He died at the age of eighty four, and as his only daughter Louise Michelle, wife of Louis Marquet, had already died in 1752, he left four grandchildren.