Saturday Prime 

Header image: Coat of Arms of the Catholic Monarchs and Their Children, 1492–1497, manuscript illumination on parchment, folio 436v, Isabella Breviary, Add MS 18851, British Library, London, UK, available from Wikimedia Commons, https://commons.wikimedia.org/wiki/File:Escudo_del_Breviario_de_Isabel_la_Cat%C3%B3lica_(1492-1497).jpg.

Video image: Unknown Flemish Miniaturist. Book of Hours: Circumcision Page (Ad Nona). Ca. 1470–1500. Manuscript illumination on parchment. Benedictine Library, Pannonhalma Archabbey, Hungary. Available from Wikimedia Commons. https://commons.wikimedia.org/wiki/File:15th-century_painters_-Book_of_Hours-_WGA15795.jpg.