Ala al-Din Juvayni was a prominent Persian historian and geographer born in 1226 in Khorasan, which is now part of modern-day Iran. He is best known for his work, "The History of the World-Conqueror," which provides a detailed account of the Mongol Empire and its conquests. Juvayni served as a governor and was closely associated with the Mongol rulers, giving him unique insights into their administration and culture. Juvayni's writings are significant for their rich descriptions and firsthand observations of the Middle East during the 13th century. His work not only chronicles historical events but also reflects the social and economic conditions of the time. Juvayni passed away in 1283, leaving behind a legacy that continues to be studied by historians today.