This is a Psalter illuminated in Paris around 1240 (CCC MS 628, f. 98r). The initial for Psalm 80 also opens with King David. The author of the psalms has placed his harp on the ground and is now playing music on a set of seven bells, which he strikes with little hammers. Bells were an important part of medieval liturgy and public celebration. The patron saint of medieval bell-ringers was Saint Agatha, whose torments during martyrdom included having her breasts cut; the similarity of their shape to bells suggested the grisly association. Her feast day is 5 February.