Martinengo Altarpiece also peeping from behind the throne, on the left. There is a total of ten saints, including St. Alexander, eponymous of the donor, portrayed with a scintillating armor and, perhaps, with the face of Martinengo himself. His wife Barbara is also portrayed next to him, as the saint with the same name. The two child angels in the low foreground are a typical element in Lotto's works. The work is signed and dated "Laurentius / Lotus / M.D.XVI". The following panels, located in other places, are usually associated with the work: Martinengo Altarpiece The Martinengo Altarpiece is a painting by
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