Buddhism was introduced into Tibet from India and China beginning in the 600s. Over the succeeding centuries, Buddhism became the dominant cultural form in Tibet, exerting a powerful influence not only over religion, but also over politics, the arts, and other aspects of society. Tibetan Buddhism eventually spread into Mongolia and Nepal, as well as into China, where it received imperial patronage especially during the Yuan (1260-1368) and Qing (1368-1644) dynasties.