Church of the Armen­ian Apos­tolic Church, locat­ed in the city known as Etch­mi­adzin (Etch­mi­adzin) and Vaghar­sha­p­at, Arme­nia. Con­sid­ered to be the first cathe­dral built in ancient Arme­nia, it is often con­sid­ered the old­est cathe­dral in the world.