The Metropolis of Smyrna was an ecclesiastical territory (diocese) of the Ecumenical Patriarchate of Constantinople, modern Turkey. The Christian community of Smyrna was one of the Seven Churches of Asia, mentioned by Apostle John in the Book of Revelation. It was initially an archbishopric, but was promoted to a metropolis during the 9th century. Although the local Christian element was reduced during the 14th and 15th centuries, it retained its ecclesiastical autonomy continuously until 1922.