The administrative divisions of the Ottoman Empire were administrative divisions of the state organisation of the Ottoman Empire. Outside this system were various types of vassal and tributary states. The Ottoman Empire was first subdivided into provinces, in the sense of fixed territorial units with governors appointed by the sultan, in the late 14th century. The beylerbey, or governor, of each province was appointed by the central government. Sanjaks were governed by sanjak beys (sancakbeyi), selected from the high military ranks by the central government. Beylerbeyis had authority over all the sancakbeyis in a region. Kaza was a subdivision of sancak and referred to the basic administrative district, governed by a kadi.