The Graphische Sammlung ETH Zurich, the Swiss Federal Institute of Technology's collection of prints and drawings, is one of the largest collections in this field in Switzerland, containing some 160,000 high-quality artworks on paper from the 15th century to the present day. Alexandra Barcal is deputy head and conservator of 20th and 21st-centruy art at Graphische Sammlung ETH Zurich.