Literally, order or arrangement. The daily prayer book. Since prayer in a synagogue came to take the place of animal sacrifices after the destruction of the Second Temple, the prayers in the Siddur were arranged to follow closely the order of sacrifices in the Temple. The three daily services are included in all daily prayer books, though some editions contain numerous additions, such as the Psalms and the Song of Songs. Many editions of the daily prayer books include the Sabbath and Festival prayers, as well as Pirke Avot (The Ethics of the Fathers). The oldest of the prayers is the Shema (Hear, O Israel). The Shemoneh Esreh