Noun
book of hours (plural books of hours)
English Wikipedia has an article on:book of hoursWikipedia
An illuminated Christian devotional book, popular in the Middle Ages.
An image from a late 14th century book of hours St. George slays the dragon. Source: Internet
Book of hours The Pentecost, from an illuminated Catholic liturgical manuscript, c.1310-1320 A book of hours is a type of devotional text which was widely popular during the Middle Ages. Source: Internet
St John the Baptist, from a medieval book of hours St. John the Baptist (c. Source: Internet