A siddur (Hebrew: סדור‎; plural סדורים siddurim) is a Jewish prayer book, containing a set order of daily prayers. This article discusses how some of these prayers evolved, and how the siddur, as it is known today has developed. A separate article, Jewish prayer, discusses the prayers that appear in the siddur, and when they are said.

Read more about Siddur:  History of The Siddur, Complete Versus Weekday Siddurim, Variations and Additions On Holidays