A finely carved ivory double comb from the 12th century has gone on display at the LWL Museum of Archaeology and Culture in Herne, Germany. One of only 60 known examples, the comb is what is known as a liturgical comb, and the only one ever found in the region of North Rhine-Westphalia. The comb was discovered in a 2017 excavation at the Holsterburg octagonal castle near Warburg. It has a rectangular central panel on both sides, each decorated with a different intricately carved pictorial motifs.