The blank, circular area in the centre of the lithography ‘Print Gallery’ (‘Prentententoonstelling’ 1956), by M.C. Escher (1898-1972) was examined and ‘filled in’ in the year 2000. This was done simply by reconstructing the circumstances in which the print was created, and in particular by picking up the drawing process where Escher had stopped. Of course, the question remains whether Escher had ever intended to ‘fill in’ that blank, circular area.