The Martyrdom of Saint Lawrence; (reverse) Giving Drink to the Thirsty. Artist: Master of the Acts of Mercy (Austrian, Salzburg, ca. 1465). Dimensions: Painted surface 29 x 18 3/8 in. (73.7 x 46.7 cm).This panel was orginally part of an altarpiece to which two panels in the Stdtisches Museum at Trier--Beheading of John the Baptist (with Harboring the Pilgrim on the reverse), and The Feast of Herod (with Feeding the Hungry on the reverse)--also belonged. When the altarpiece was closed, the Acts of Mercy could be seen while the opened altarpiece showed the gold-ground paintings with scenes from the life of John the Baptist and Saint Lawrence. Since the Acts of Mercy depicted in the art of this period commonly numbered six, three panels are probably missing from the wings of the altarpiece, one with the Baptism of Christ, and two other scenes from the life of Saint Lawrence. There is no indication of the contents of the central panel. An altarpiece by the same