 Further up, ascending a twisting stone staircase in a tunnel, were the royal quarters, and at the very top, the summer palace.TV Presenter and historian Michael Wood, in the "Shangri-La" episode of the BBC TV/PBS documentary series "In Search of Myths and Heroes", suggested that Tsaparang was the historical origin of the legend of Shangri-La, and that its two great temples were once home to the kings of Guge in modern Tibet.According to some accounts, Tsaparang was made the capital of a Kingdom of Guge by Namde Wosung, one of the sons of the Langdharma the anti-Buddhist king of Tibet 838-841 CE, after Langdharma was assassinated.