kathismata is increased so that the entire Psalter is read twice a week. In the twentieth century, some lay Christians have adopted a continuous reading of the Psalms on weekdays, praying the whole book in four weeks. Aside from kathisma readings, Psalms occupy a prominent place in every other Orthodox service including the services of the Hours and the Divine Liturgy. In particular, the penitential Psalm 50 is very widely used. Fragments of Psalms and individual verses are used as Prokimena (introductions to Scriptural readings) and Stichera. The bulk of Vespers would still be composed of Psalms even if the kathisma were to be disregarded; Psalm 118, "The Psalm of the Law", is the centerpiece of Matins on Saturdays, some Sundays, and the Funeral service. The entire book of Psalms is traditionally read out loud or chanted at the side of the deceased during the time leading up to the funeral, mirroring Jewish tradition. Oriental Christianity Several branches of Oriental Orthodox and those Eastern Catholics who follow one of the Oriental Rites will chant the entire Psalter during the course of a day during the Daily Office. This practice continues to be a requirement of monastics in the Oriental churches. Catholic usage The Psalms have always been an important part of Catholic liturgy. The Liturgy of the Hours is centered on chanting or recitation of the Psalms, using fixed melodic formulas known as psalm tones. Early Catholics employed the Psalms widely in their individual prayers also; however, as knowledge of Latin (the language of the Roman Rite) became uncommon, this practice ceased among the unlearned. However, until the end of the Middle Ages, it was not unknown for the laity to join in the singing of the Little Office of Our Lady, which was a shortened version of the Liturgy of the Hours providing a fixed daily cycle of twenty-five psalms to be recited, and nine other psalms divided across Matins. The work of Bishop Richard Challoner in providing devotional materials in English meant that many of the psalms were familiar to English-speaking Catholics from the eighteenth century onwards. Challoner translated the entirety of the Little Office into English, as well as Sunday Vespers and daily Compline. He also provided other individual Psalms such as 129/130 for prayer in his devotional books. Bishop Challoner is also noted for revising the Douay–Rheims Bible, and the translations he used in his devotional