The Kurt dynasty, also known as the Kartids was a Sunni Muslim dynasty of Tajik origin, that ruled over a large part of Khorasan during the 13th and 14th centuries. Ruling from their capital at Herat and central Khorasan in the Bamyan, they were at first subordinates of Sultan Abul-Fateh Ghiyāṣ-ud-din Muhammad bin Sām, Sultan of the Ghurid Empire, of whom they were related, and then as vassal princes within the Mongol Empire. Upon the fragmentation of the Ilkhanate in 1335, Mu'izz-uddin Husayn ibn Ghiyath-uddin worked to expand his principality. The death of Husayn b. Ghiyath-uddin in 1370 and the invasion of Timur in 1381, ended the Kurt dynasty's ambitions.