Zvartnots Cathedral, Armenia
The cathedral is a centrally planned, aisled tetraconch cathedral built in the 7th century by Nerses III the Builder, the Catholicos of the Armenian Apostolic Church between 641 and 661. He ruled at a troubled time during which Armenia had to choose between their Byzantine neighbors and the Persians along with their new conquerors the Arabs.
Construction of the cathedral began in 643 and it was dedicated to St. Gregory. It was located at the place where a meeting between King Trdat III and Gregory the Illuminator was supposed to have taken place.
Zvartnots remained standing until the end of the 10th century, but historical sources are silent as to the cause of its collapse. Excavations revealed that Zvartnots stood on the remnants of structures that dated back to reign of Rusa II, king of Urartu between around 680 BC and 639 BC.
The ruins are located at the edge of the city of Etchmiadzin in Armavir Province of Armenia.