The development of folk poetry in Turkish—which began to emerge in the 13th century with such important writers as Yunus Emre, Sultan Veled, and Şeyyâd Hamza—was given a great boost when, on 13 May 1277, Karamanoğlu Mehmet Bey declared Turkish the official state language of Anatolia's powerful Karamanid state; subsequently, many of the tradition's greatest poets would continue to emerge from this region.