In this way, Güshi Khan established the Fifth Dalai Lama as the highest spiritual and political authority in Tibet. 'The Great Fifth' became the temporal ruler of Tibet in 1642 and from then on the rule of the Dalai Lama lineage over some, all or most of Tibet lasted with few breaks for the next 317 years, until 1959, when the 14th Dalai Lama fled to India. In 1645, the Great Fifth began the construction of the Potala Palace in Lhasa.