The Battle of Köse Dağ was fought between the Sultanate of Rum ruled by the Seljuq dynasty and the Mongol Empire on June 26, 1243, at the defile of Kösedağ, a location between Erzincan and Gümüşhane in modern northeastern Turkey.[10][11] The Mongols achieved a decisive victory.

Timur[b] or Tamerlane[c] (8 April 1336[7] – 17–19 February 1405) was a Turco-Mongol conqueror who founded the Timurid Empire in and around modern-day Afghanistan, Iran, and Central Asia, becoming the first ruler of the Timurid dynasty. An undefeated commander, he is widely regarded as one of the greatest military leaders and tacticians in history, as well as one of the most brutal and deadly.[8][9][10] Timur is also considered a great patron of art and architecture as he interacted with intellectuals such as Ibn Khaldun, Hafez, and Hafiz-i Abru and his reign introduced the Timurid Renaissance.[11]