At its October 2015 Board of Trustees meeting, the National Gallery of Art acquired a large number of drawings, prints and photographs that greatly strengthen its collection. Highlights include extraordinary drawings by Pieter Jansz Saenredam (1597–1665) and Hans Rottenhammer (1564–1625), a bound volume with over 200 15th-century woodcuts, as well as a painting from the Thesaurus series by Mel Bochner (b. 1940). Promised photographs include numerous outstanding gelatin silver prints by Diane Arbus (1923–1971), Richard Avedon (1923–2004), and Robert Frank (b. 1924).