The Assyrian Church of the East ( ʻIttā d-Madnĕkhā d-Āturāyē), officially the Holy Apostolic Catholic Assyrian Church of the East (, ʻIttā Qaddishtā w-Shlikhāitā Qattoliqi d-Madnĕkhā d-Āturāyē), is a Syriac Church historically centred in Assyria, northern Mesopotamia, an area which is today encompassed by northern Iraq, north eastern Syria, south eastern Turkey and the north western fringes of Iran. It is one of the churches that claim continuity with the historical Patriarchate of Seleucia-Ctesiphon – the Church of the East. Unlike most other churches that trace their origins to antiquity, the modern Assyrian Church of the East is not in communion with any other churches, either Orthodox, Coptic, Roman Catholic or Protestant.