Where was the body of XXX buried?
Baron d'Holbach
During the summer months, when Paris was hot and humid, Baron d'Holbach retreated to his country estate at Grandval, Le Château de Grand-Val (Sucy-en-Brie today N° 27 rue du Grand-Val on the outskirts of Paris (Département Val-de-Marne). There he would invite friends to stay for a few days or weeks, and every year he invited Denis Diderot. D'Holbach was known for his generosity, often providing financial support discreetly or anonymously to his friends, amongst them Diderot. It is thought that the virtuous atheist Wolmar in Jean-Jacques Rousseau's Julie, ou la nouvelle Héloïse is based on d'Holbach. Holbach died in Paris on 21 January 1789, a few months before the French Revolution. The authorship of his various anti-religious works did not become widely known until the early 19th century. Ironically, he was buried in the Church of Saint-Roch, Paris. The exact location of the grave is unknown.
Saint-Roch