20 km far from Yerevan there is the center of Armenian Apostolic church- St. Echmiadzin. The Cathedral of Echmiadzin was built at the beginning of the forth century and is one of the oldest churches in the world. According to the legend, the church was built in the place where apparition of Jesus Christ was seen to Grigorius the Illuminator in the dream. The interior of the church is covered with frescoes created by Hovnatanyan family. The residence of the Catholicos and the Theological Academy are situated near the Cathedral.