Obsecro te (I Beseech You)
The Obsecro te ('I beseech you') is one of the two universal private Marian prayers found in virtually every medieval Book of Hours produced for noble or royal women across western Europe, making it the single most widely owned personal Marian prayer of the entire period. The feminine grammatical forms in the prayer allowed scribes to identify the manuscript's female patron, and its opening illumination almost invariably depicted that woman kneeling in intimate address before the Virgin and Child, personalizing the prayer to a degree no other devotional text achieved. This direct invocation of Mary—citing her joy at the Annunciation, her grief at the Crucifixion, and her power of intercession at the hour of death—gave it a comprehensiveness that made it the first prayer many noble women turned to in private devotion. It is documented in the Books of Hours of Anne of Brittany, Catherine of Cleves, and Isabella Stuart, among many hundreds of other surviving manuscripts.