The '''Greek Orthodox Archdiocese of Thyateira and Great Britain''', a [[diocese]] of the [[Ecumenical Patriarchate]], is the body responsible for the Greek Orthodox Church in Great Britain and is headquartered in London. The Archdiocese is currently headed by His Eminence [[Archbishop]] [[Gregorios Nikitas_(TheocharousLulias) of Thyateira and Great Britain_of_Thyateira|GregoriosNikitas]] of Thyateira and Great Britain.