Saint Gregory the Illuminator Cathedral is the largest Armenian Apostolic Church cathedral in the world. Located in the Armenian capital Yerevan, construction started in 1997 and the consecration took place on 23 September 2001, on the occasion of the 1,700th anniversary of the proclamation of Christianity as the state religion of Armenia. The building consists of three churches, the nave, with seating for 1,700, and the side chapels of Saint Tiridates the King and Saint Ashkhen the Queen, each of which has 150 seats; these two royal figures provided crucial help to Saint Gregory the Illuminator in his task of converting Armenia to Christianity. The belfry tower is located above the entrance, and rooms for receptions and church-related activities are provided on the lower floor.Photograph credit: Marcin Konsek