Beylerbeyi Mosque is located on the Anatolian shore of the Bosphorus next to the Beylerbeyi quay. It was built by Sultan Abdülhamid I in 1778 in memory of his mother, Rabia Sultan and designed by the architect Tahir Ağa. The mosque is constructed in Baroque style, of cut stone. It is octagonal in shape with two minarets and 55 windows. There is just one dome with the area in front of the mosque niche covered with a half-dome. The interior is decorated with inscriptions and engravings. The mosque is covered with both Ottoman and European glazed tiles. It is a fine example of the merge of different cultures.