Ejmiatsin cathedral is the most ancient Christian temple of Armenia. It was built in 301-303 by Grigor Luysavorich, the founder of the Armenian Gregorian church. It rebuilt in 480's. It is the seat of the Katholikos (Catholicos).
The Cathedral is part of a monastery having the same name and is surrounded by walls which enclose a series of structures. These structures include the Palace of the Katholikos, a seminary, museum, refectory, synod house, library, printing house, monks' cells, and other buildings. Ejmiatsin is the spiritual center of all Armenians.