St John Altarpiece (Memling) similar Memling work is the "" held at the Louvre, which Georges Hulin de Loo determined to have been completed earlier than the "St John Altarpiece" and the New York panel. The "Cellier Diptych" has the Virgin and Child in an enclosed garden with the same two Saints Catherine and Barbara on the left-hand panel. The composition is remarkably similar to the New York panel and the altarpiece, with the Virgin on her throne and St Catherine and St Barbara positioned to form a triangle. The "Cellier Diptych" includes four additional female saints (with attributes) sitting around the Virgin: St
Heller Altarpiece Heller Altarpiece The Heller Altarpiece was an oil on panel triptych by German Renaissance artists Albrecht Dürer and Matthias Grünewald, executed between 1507 and 1509. The artwork was named after Jakob Heller, who ordered it. Dürer painted the interior, Grünewald the exterior. In 1615, Dürer copyist Jobst Harrich painted a duplicate, which is now at the Städel of Frankfurt. The side panels, executed by Bosch's workshop basing from his drawings, are at the Staatliche Kunsthalle of Karlsruhe. The painting was commissioned by Frankfurt merchant Jakob Heller, for the Dominican church of the city. In 1615, the central panel, the only