No. 1: RELIEF MIT DEN KLUGEN UND TÖRICHTEN JUNGFRAUEN,
16th century, sandstone 52x42x22cm (LxBxH), Bonner Kunstverein, Bonn 11.03.2006-23.04.2006

Possibly the board comes from Bonn Münster. It was damaged by bombs banging into the museum during the Second World War.

© the artists / Bonner Kunstverein