A "Book of Hours" is a Christian devotional book popular in the Middle Ages, particularly from the 13th to the 16th centuries. It typically contains a collection of prayers, psalms, and readings designed for personal use throughout the day. These books were often richly illustrated and customized for individual patrons, making them valuable both spiritually and artistically. The content of a Book of Hours usually includes the {Hours of the Virgin}, prayers for various saints, and sections for specific liturgical seasons. They served as a guide for daily prayer and reflection, allowing laypeople to engage more deeply with their faith outside of formal church services.