In a painting by this artist now in the Stadel Gallery, St. Cosmas puts a coin into a handbag on his belt and stands to the right of Mary. Juan de Fla
In a painting by this artist now in the Stadel Gallery, St. Cosmas puts a coin into a handbag on his belt and stands to the right of Mary. Juan de Flandes' copy of a non-moveable altarpiece by this artist changes Mary's dress from red to black in the central arched panel.  A woman in green dress reads next to a small ointment jar in a surviving panel by this artist known as The Magdalen Reading.  This artist of Lady Wearing a Gauze Headdress also painted a work where the title saint uses silverpoint to render Mary and her child; that painting is St. Luke Drawing the Virgin. This creator of the Miraflores Altarpiece is best known for a work tightly enclosed by a gold box, commissioned by the Confraternity of the Archers of Leuven for their chapel. That work shows Nicodemus and Joseph of Arimathea supporting a certain figure who forms the shape of a crossbow. FTP, name this student of Robert Campin, a Flemish Renaissance artist known for his Deposition. 
In a painting by this artist now in the Stadel Gallery, St. Cosmas puts a coin into a handbag on his belt and stands to the right of Mary.
Rogier van der Weyden [or Roger de la Pasture; accept any underlined answer]