Photograph by Josef Löwy, 22 August 1889, 29 × 23 cm, negative no. 1374 II 1177, plate negative no. 1374 II 1177: Jan van den Hoecke, reworked by Peter Paul Rubens, Cardinal-Infante Ferdinand (c.1634/35), Kunsthistorisches Museum Vienna, Picture Gallery, inv. no. 699