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Lavishly illustrated Books of Hours, 12th through 16th centuries, Center for Digital Initiatives, University of Vermont Libraries

The Sforza Hours at the British Library.

Book of Hours, Use of Rome (the 'Golf Book'), c.1540, BL, Add MS 24098.

Catholic Church. Book of hours Ms.Library of Congress. Rosenwald ms. 10, 1524. 113 leaves (23 lines (calendar 33 lines)), bound: parchment, col. ill.; 24 cm.

Picturing Prayer, Books of Hours at Houghton Library, Harvard University.

Book of Hours, of Premonstratensian Use at the Digital Archives Initiative Memorial University of Newfoundland.

Late 15th Century French Book of Hours- De Villers Book of Hours, Digitized Collection: Utah State University.