As Mongolia's largest city, and the country's only settlement of significant size, Ulan Bator has understandably become the country's cultural centre. The National History Museum, located near the vast Chinggis Square (formerly Sükhbaatar Square) features a hall dedicated to Mongolian history, its folklore and traditions, including an interesting display on Mongolian costume and other artefacts from the age of Genghis Khan. The Zanabazar Museum of Fine Arts displays Mongolian art from prehistory through to the early 20th century. The museum takes its name from the creator of the collection's most significant exhibits, the sculptures and paintings by Undur Geghen Zanabazar (1635-1723), one of Mongolia's greatest artists. Gandan Monastery was once the only Buddhist monastery allowed to operate under communist rule, and even then only as a showcase to foreigners. Today there are 150 resident monks, and visitors can tour the monastery and see the statue of a bodhisattva (Buddhist saint). A short drive south of the city is the winter palace, which was previously one of the residences of the Bogd Khan (Emperor of Mongolia). The palace has survived virtually intact and is now preserved as a museum with many of the Khan possessions on display, including the throne, robes, and a collection of art and taxidermy.