 Complete the following phrase:  Theodores mother died sometime before 1490, and his father sent Theodore, then still a child, to live with his great-aunt, Mara Branković. Mara was the daughter of Đurađ and Irene, who had been taken as one of the wives of the Ottoman Sultan Murad II. After Murads death in 1451, Mara was allowed by her stepson Sultan Mehmed II, to retire to her estate at Ježevo, where she maintained a privileged and protected enclave of Christian faith Nicol. It was in this exalted and privileged environment that Theodore was brought up, and it was there that he learned to speak some Turkish and acquired first-hand knowledge of Turkish customs and history. In 1503, he visited the Ottoman capital of Constantinople to aid his brother Alexander, who had been brought to ficial ruin by the recently concluded 