More popular than the Bible: that’s what the richly illustrated volumes known as books of hours—which helped worshipers keep track of each day’s seven canonical prayer periods—were during the Middle Ages. A trove of these objects from the Elaine and Alexandre Rosenberg collection is up for sale on April 23 at Christie’s, and in this special episode of the podcast Ben and Christie’s specialist Eugenio Donadoni zoom in on a particularly opulent example illuminated by the mysterious Master of the Paris Bartholomeus Anglicus.

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