Perpetual calendar, Jan Claudius de Cock, between 1692 and 1697

Date: between 1692 and 1697. Dimensions: height: 29.3 cm (11.5 in); width: 16.1 cm (6.3 in). Medium: black chalk, brown ink, brown wash. Collection: Louvre Museum. Jan Claudius de Cock - Study for a statue of William III of Orange