The Three Crowned rulers, or the Three Glorified by Heaven,[1] or World of the Three[2] or The Tamil Kings, primarily known as Muvendar, refers to the triumvirate of Chera, Chola and Pandya who dominated the politics of the ancient Tamil country, Tamilakam, from their three Nadu (countries) of Chola Nadu, Pandya Nadu (present day Madurai and Tirunelveli) and Chera Nadu (present day Kerala and some parts of Tamilnadu) in southern India.[3] (From wiki)