Depicting an enthroned Virgin and Child in the central panel, flanked by St John on the left with an elongated scroll and the prophet Zacharias on the right, this ivory is richly carved and extensively detailed. The top panel furthers the Christological narrative, bearing two flying angels and a typically Byzantine rendering of Christ encircled, beardless and blessing to convey his position as the judge of humanity, or Pantocractor. It was a common image above doorways to churches and chapels, signifying the crossing of the boundary into the divine realm. As this particular ivory appeared on the front of a book, the image would hold a similar purpose in the traversing of boundaries, as the volume was opened and closed, concealing and revealing material within. The bottom layer of the ivory, meanwhile, shows the Nativity and Annunciation to the Shepherds. It allows the artist to extend the narrative and show off their skill, illustrating architecture, angels and animals alongside ...