After conquering Constantinople and the execution of grand vizier Çandarlı Halil Pasha, Mehmed II had preferred to appoint grand viziers of devsirme origin instead of Ethnic Turks to avoid possible crises caused by over-powerful grand viziers.[4] After executing his last Turkish, his next four grand viziers were of devsirme origin. Karamani Mehmet's appointment as grand vizier in 1476 therefore marks a notable exception, for he was a Turk from the recently conquered Karamanid territory in Anatolia. In his short term in the office, Karamani Mehmet tried to reform the Ottoman administration.