Kharkhorin was the formerly great capital city, built by Ugudei Khaan in 1235. The city was strategically located at the crossroads of traditional routes, creating a staging post for migrating nomads and merchants caravans. Foreign envoys and prominent clerics travelled to this city for an audience with Mongol khaan. Far after when the Hubilai Khaan moved t the capital to Beijing in 1264, Kharkhorin was raised to the ground by Manchu soldiers. However the bricks and stones from the ruins of this ancient city were used to build the Erdene Zuu Monastery nearby, so in that way the old city lives on till today. Erdene Zuu Monastery: The first Buddhist monastery in Mongolia, Erdene Zuu was established on the ruin of ancient Kharkhorin city in 1586 by Avtai Sain khan, probably the most ancient surviving Buddhist monastery in Mongolia.