Mongol invasion of Rus'
Under Dolgoruky's son, Andrey Bogolyubsky (1157–1175) (also known as Andrew the Pious), the city became the center of the Vladimir-Suzdal Principality. It had a Golden Age, which lasted until the Mongol invasion of Rus' in 1237. During this time, Vladimir enjoyed immense growth and prosperity. Andrey oversaw the building of the city's Golden Gates and the Dormition Cathedral. In 1164, Andrey attempted to establish a new metropolitanate in Vladimir, separate from that of Kiev. He was rebuffed by the Patriarch of Constantinople.