Rogier van der Weyden (Netherlandish, 1399/1400 - 1464), Portrait of an Unknown Young Woman, c. 1435/1440, silverpoint on cream prepared paper, 6 9/16 × 4 9/16 (16.6 × 11.6), On loan from The British Museum, London © The Trustees of the British Museum, London, 1874,0808.2266.