Yerevan serves as the capital and largest city of Armenia, functioning as the nation's administrative, cultural, and industrial center. Situated along the Hrazdan River on the Ararat Plain, it is one of the world's oldest continuously inhabited cities. As a primate city, Yerevan holds significant political weight, having been the capital since 1918 and the seat of the Araratian Pontifical Diocese of the Armenian Apostolic Church.