The Chagatai language was a literary language used to preserve poems and scientific texts.
Uzbek ruler Muhammad Shaybani Khan wrote a prose essay called "Risale-yi maarif-i Shayibani" in  Chagatai in 1507, shortly after his capture of Greater Khorasan, and dedicated it to his son, Muhammad Timur
 His fame is attested by the fact that Chagatai is sometimes called "Nava'i's language"

