Cause of death: heart attack
Comte Jean Bruno Wladimir François-de-Paule Lefèvre d'Ormesson (16 June 1925 – 5 December 2017) was a French writer and novelist. He authored forty books, was the director of Le Figaro from 1974 to 1977, as well as the dean of the Académie Française, to which he was elected in 1973, until his death, in addition to his service as president of the International Council for Philosophy and Humanistic Studies within UNESCO (1992–1997).
Source : Wikipedia