Complex sentence: The earliest datable references to this Tamil dynasty are in inscriptions from the 3rd century BC left by Asoka, of Maurya Empire; as one of the Three Crowned Kings, the dynasty continued to govern over varying territory until the 13th century AD.
Split into simpler sentences: The earliest datable references to this Tamil dynasty are in inscriptions from the 3rd century BC left by Asoka, of the Maurya Empire. As one of the Three Crowned Kings, the dynasty continued to govern over varying territory until the 13th century AD.