Apostolic Church is the Armenian National Church. The canter of which is the Saint Cathedral of Echmiadzin. The Supreme Catholicos (Patriarch) of All Armenians is the head of the church. The church is called Apostolic as it was founded by Jesus Christ and his Apostles St. Thaddeus and St. Bartholomew, who were the first to sermonize Christianity in Armenia and here they were martyred (1st century AD). Christianity came into Armenia from Asorik and Kapadovkia and at first it spreaded out in the southern and western parts of the Kingdom of Greater Armenia (Mets Hayk). In 301 AD, during the ruling time of the Armenian king Trdat G, by the efforts of the first Armenian Catholicos Gregory the Illuminator Christianity was officially adopted as the State Religion of the Kingdom of Greater Armenia (Mets Hayk).
Armenian Apostolic Church is formed by the Catholicosate of All Armenians, Armenian Catholicosate of the Great House of Cilicia, Armenian Patriarchate of Jerusalem and Armenian Patriarchate of Turkey. Armenian Church has its representatives in Moscow and in the Patriarchate of All Russians, in Canterbury and in the Archbishopric of all Britains.
There are five monasteries in Armenia: St. Hripsime, St. Gayane, st. Shoghakat, St. Geghard and Khor Virap.