Psalter, Italy?, Middle 15th Century?

The Psalter, or Book of Psalms, contained a calendar and other devotional texts used in the Christian liturgy and for private devotions. All 150 Psalms were recited each week, the majority at matins and vespers. A single volume psalter generally contained a cycle of calendar pages used for calculating feast days, the psalms themselves, and a collection of canticles and creeds. This double leaf bears selections from Psalms 38 and 94, a distinctive initial "D", and music to be sung in the service.