Piyyut
A piyyut is a Jewish liturgical poem, usually designated to be sung, chanted, or recited during religious services. Piyyutim have been written since Mishnaic times. Most piyyutim are in Hebrew or Aramaic, and most follow some poetic scheme, such as an acrostic following the order of the Hebrew alphabet or spelling out the name of the author. Many are in the quantitative metres used for Arabic poetry.
Many piyyutim are familiar to regular attenders of synagogue services. For example, the best-known piyyut may be Adon Olam ("Master of the World"), sometimes attributed to Solomon ibn Gabirol in 11th century Spain. Its poetic form consists simply of rhyming eight-syllable couplets, and it is so beloved that it is often sung at the conclusion of many synagogue services, after the ritual nightly saying of the Shema, and during the morning ritual of putting on tefillin. Another well-beloved piyyut is Yigdal ("May God be Hallowed"), which is based upon the Thirteen Principles of Faith developed by Maimonides.
Piyyutim have traditional tunes, but these vary greatly between communities, and a single community may have up to ten different tunes for well-known piyyutim such as Adon Olam and Yigdal. Modern Jewish composers such as Philip Glass often compose choral settings of piyyutim.
Read more about this topic: Religious Jewish Music