Kayqubad I
The double-headed eagle motif was adopted in the Seljuk Sultanate of Rûm and the Turkic beyliks of medieval Anatolia in the early 13th century. A royal association of the motif is suggested by its appearance on the keystone of an arch of the citadel built at Konya (former Ikonion) under Kayqubad I (r. 1220–1237). The motif appears on Turkomen coins of this era, notably on coins minted under Artuqid ruler Nasir al-Din Mahmud of Hasankeyf (r. 1200–1222). It is also found on some stone reliefs on the towers of Diyarbakır Fortress.