North of Karakorum, Erden-Züü monastery, built between the 16th century to the 19th century on top of the ruins, was the first great Buddhist monastery in Mongolia. The temples which escaped systematic destruction in Soviet times are now transformed into museums, and since the bill on freedom of worship was passed in the 1990's, the site has been welcoming people for prayer again. This Mongol architectural style stands next to the Chinese and Tibetan styles. Its gold stupa is surrounded by a wall of 108 small stupas. The 3 large Züü (temples) display some paintings and statues of Buddha.