"This publication documents a little-known temporary artwork. In the winter of 1973/74, Paul Thek (1933–1988) was a guest of the Lehmbruck Museum in Duisburg, where he installed the room-filling environment "Ark, Pyramid – Christmas" ("The Manger")--a development of the legendary "Pyramid" installation realized at Documenta 5 in 1972. This exhibition, organized by the director of the museum at the time, Siegfried Salzmann, was the fourth ..."