Sultan Mehmed II disliked his late father's grand vizier Çandarlı Halil Pasha the Younger, whom he had inherited from his father Murad II upon his succession to the throne in 1451. After conquering Constantinople (Istanbul) in 1453, he had Halil executed, making him the first of many grand viziers to be executed. After Halil, four of his grand viziers were of "devşirme" (i.e. non-Turkish and non-Muslim) origin. There was indeed a rise in slave administrators, who were much easier to control.