Songtsän Gampo
He belonged to the Yarlung dynasty connected to the Yarlung district in Southern Tibet. Modern scholars believe that he was a historical ruler, as he is also mentioned in a Chinese source. They date his rule to the fifth century, because the 33rd king Songtsän Gampo died in 650; other calculations putting his birth at 173 or 254 are nowadays rejected. He did not rule over the whole of Tibet; his power was probably limited to the Yarlung Tsangpo Grand Canyon area.