The Mother See of Holy Etchmiadzin is the spiritual center of all Armenians and the Holy See of the Supreme Patriarch and Catholicos of All Armenians.
The Mother Cathedral of Holy Etchmiadzin is the first official cathedral of the Christian world, which was built in 301-303, initiated by and through the efforts of St. Trdat III Great Armenian king and St. Gregory the Illuminator. The temple was built based on the vision of St. Gregory the Illuminator, according to which the Only Begotten Son of God, Jesus Christ, descended to the Ararat Valley, the capital of Armenia Vagharshapat, and ordered that the temple of God – “the house of prayer and supplication of all believers, the seat of the priesthood” be right there.
The Mother Cathedral of Holy Etchmiadzin is the first cross-domed church in world ecclesiastical architecture.
A comprehensive renovation of the Mother Cathedral began in 2012, which is scheduled to be completed in 2021.
In 2000 the Mother Cathedral has been included in the UNESCO World Heritage List.