A parchment manuscript of the Mukachevo Psalter or a Book of Psalms created sometime during the 14th or the 15th century. It is part of the museum's rare book collection that spans and includes materials from the 14th to the late 17th century.
This manuscript may be a copy of the Polyeleos, "Service of Sophia, the Wisdom of God, which is in the Great New City,” compiled in the 1st half of the 17th century (before 1646) by Prince Simeon Shakhovsky.