The Archdiocese of Thyateira and Great Britain is an archdiocese of the Eastern Orthodox Church, part of the Ecumenical Patriarchate of Constantinople. Its present head is Archbishop Nikitas Loulias. Its jurisdiction covers those Orthodox Christians living in Great Britain, the Republic of Ireland, the Isle of Man, and the Channel Islands. The adherents are largely of Cypriot Greek descent, mainland Greek migrants and their descendants, and more recently native British converts along with a few Poles, Belarusians, and Ukrainians. The former archbishop, Gregorios, himself was a Cypriot whose ancestral village of Marathovounos, in the district of Famagusta, is occupied by the Turkish army. The archdiocese is based at Thyateira House, in the Bayswater district of London.