This article overviews the written sources on religious beliefs and funeral rituals of the Kyrgyz people of the Tien Shan from the Middle Ages to the Modern Period. The study draws on the works of historians, poets, travelers, and anonymous authors, written in various languages and translated by V.V. Bartold, Z.N. Vorozheykina, O. Karaev, and other scholars. Analysis of these sources provides...