In this regard, Braque likely knew of the iconographical use of a skull in an extraordinary 15th-century altarpiece panel picture in the Louvre, painted by the Netherlandish master Rogier van der Weyden and named the "Braque Triptych" for the work's patron, one Jehan Braque of Tournai.
WSJ: Vanitas I | Georges Braque | Denying Death | Masterpiece by E.A. Carmean Jr.