Devotion to the Virgin Mary shaped and colored all aspects of medieval Christianity. This Companion offers a comprehensive overview of the foundations of this devotion as it appears in biblical commentary, poetry, art, miracle stories, liturgy, magical practices and popular songs, including detailed studies of Mary's place in both daily devotions and scholastic doctrine, along with close readings of exemplary works of exegesis, philosophy, theology and poetry by Rupert of Deutz, John of Garland, Servasanctus of Faenza, and Ramon Llull. Together, these studies suggest a significant reframing of our understanding of Mary's medieval role as mother, goddess, Temple, beloved, and jewel as crafted by her devotees through imagination and prayer.