evidence: Tibet, the remote and mainly-Buddhist territory known as the "roof of the world", is governed as an autonomous region of China. [...] Beijing claims a centuries-old sovereignty over Tibet. However, this Chinese view of imperial rule over Tibet spanning many centuries is disputed by exiled Tibetan communities and rights groups. [...] No country openly disputes China's claim to sovereignty, and China has blocked all UN Security Council resolutions on Tibet since the People's Republic took over the China seat in the UN in 1971.