St. George's Cathedral, also known as the Aya Yorgi Greek Patriarchal Church, is located in the Fener district on the banks of the Golden Horn. It is the fifth church that has housed the Greek Orthodox Patriarchate since the fifteenth century, and was formerly a monastery for Orthodox nuns, and was converted into patriarchal offices between 1598 and 1601, which is famous today for its valuables. Its building is divided into three parts, including a vestibule containing icons of Saints George and Elijah, a nave and an altar. It also retains the traditional style of the basilica with its three aisles.