[1] He was one of the most noted and least servile pupils of Le Brun, under whose direction he shared in the chief of the great decorative works undertaken in the reign of Louis XIV.

William III vainly strove to detain him in England by the proposal that he should decorate Hampton Court, for Le Brun was dead, and Jules Mansart pressed La Fosse to return to Paris to take in hand the cupola of Les Invalides.

The decorations of Montagu House are destroyed, those of Versailles are restored (though his The Finding of Moses for it survives in the Louvre), and the dome of the Invalides (engraved by Picart and Cochin) is now the only work existing which gives a full measure of his talent.

During his latter years La Fosse executed many other important decorations in public buildings and private houses, notably in that of Pierre Crozat, under whose roof he died on 13 December 1716.

La Fosse's style prior to his emergence from the shadow of Le Brun remains a mystery, with very few sheets by him dating earlier than 1680.