The Utrecht Psalter (Utrecht, Universiteitsbibliotheek, MS Bibl. Rhenotraiectinae I Nr 32.) is a ninth-century illuminated psalter which is a key masterpiece of Carolingian art; it is probably the most valuable manuscript in the Netherlands. It is famous for its 166 lively pen illustrations, with one accompanying each psalm and the other texts in the manuscript (Chazelle, 1055). The precise purpose of these illustrations, and the extent of their dependence on earlier models, have been matters of art-historical controversy. The psalter spent the period between about 1000 to 1640 in England, where it had a profound influence on Anglo-Saxon art, giving rise to what is known as the "Utrecht style". It was copied at least three times in the Middle Ages. A complete facsimile edition of the psalter was made in 1875 (Lowe, 237), and another in 1984 (Graz).
The other texts in the book include some canticles and hymns used in the office of the hours, including various canticles, the Te Deum and Athanasian Creed. The latter text was the subject of intense study by Thomas Duffus Hardy and others after scholarly interest in the psalter grew in the 19th century.