The Ormesby Psalter is one of the most well-known yet mysterious manuscripts to survive the Middle Ages. It was made in a series of campaigns over many decades, starting in the late-thirteenth century, and the main decorated pages were executed in the 1310s for a marriage that never took place. Likely meant for private devotion by its wealthy patrons, this exquisite book of psalms was left unfinished.

Housed in Oxford's Bodleian Library for over 150 years, this enigmatic masterpiece is perhaps the most magnificent yet enigmatic of the great Gothic psalters produced in East Anglia in the...