This leaf is distinguished by a large initial P depicting Samuel, the last and one of the greatest of Israelâ€™s judges. It introduces the text Preparte corda vestra domino et servite (â€śPrepare your hearts for the Lord and serveâ€ť). In the lower margin are the arms of the Visconti family, rulers of Milan, featuring an eagle (left) and a coiled serpent (right). At bottom center is the emblem of the Olivetan Order, a reformed branch of the Benedictines founded in 1319 known as the â€śwhite monks.â€ť The Olivetan monastery in Milan was founded in 1400 and it appears that this leaf belonged to a set of choral books presented to the monastery by one of the Visconti, perhaps about 1439â€“47. The so-called Olivetan Master takes his name from a luxuriously illustrated psalter made for the orderâ€™s monastery in Milan, where he was undoubtedly a monk.