Babur, the Turco-Mongol founder of the Mughal Empire, wrote about a "famous" diamond that weighed just over 187 old carats – approximately the size of the 186-carat Koh-i-Noor. Some historians think Babur's diamond is the earliest reliable reference to the Koh-i-Noor. According to his diary, it was acquired by Alauddin Khalji, second ruler of the Khalji dynasty of the Delhi Sultanate, when he invaded the kingdoms of southern India at the beginning of the 14th century and was probably in the possession of the Kakatiya dynasty. It later passed to succeeding dynasties of the Sultanate, and Babur received the diamond in 1526 as a tribute for his conquest of Delhi and Agra at the Battle of Panipat.