This drawing by Rembrandt van Rijn (1606–1669), which entered the Liberna Collection in 1953, was previously erroneously attributed to Rembrandt’s pupil Salomon Koninck (1609– 1656). It shows an elderly man in profile, seated in an armchair and resting his hands on a stick, against a grey wash background. The way in which Rembrandt works here with red chalk, wash and opaque white, as well as his handling of line and chiaroscuro contrasts, are typical of his drawings around 1631. Two paintings in particular are key to the attribution to Rembrandt. The first, in the Galleria Sabauda in Turin, is by Salomon Koninck and shows a similar seated old man. The second, formerly in a private collection and today in Montreal, is signed by Jan Lievens (1607–1674) and shows the exact same sitter as our drawing. The comparison of the two paintings has led to Rembrandt being identified as the originator of the drawing. This latter evidently served as the basis for the Montreal painting by Lievens – a conclusion supported by the fact that Rembrandt and Lievens both lived in Leiden for a considerable time, were close friends and influenced each other.