A piyyut (plural piyyutim, Hebrew פיוט, pronounced [piˈjut, pijuˈtim]; from Greek poietes "poet") is a Jewish liturgical poem, usually designated to be sung, chanted, or recited during religious services. Piyyutim have been written since Temple 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. The author of a piyyut is known as a paytan or payyetan (plural paytanim).