For almost the first thing one notices, I think, is that the bed is also a church.

Caroline Walker Bynum

Jesueau (Christ Child in Crib)
Held at Namur, Musee des Arts Anciens
Early 15th century, Belgium
(accessed via UMich Digital Archives)

Caroline Walker Bynum, “Encounter: Holy Beds,” Gesta 55, no. 2 (Fall 2016): 129-131. https://doi.org/10.1086/687150