Tibet history. Millions of years ago, Tibet was cover by a big sea. Slowly, great pressure from the Indian continent forced the land north of the Himalayan range upward to became the Asian plateau of Tibet. It’s average elevation is about four thousand meters above the sea level and is also known as the Land of Snow. Tibet has an ancient history. But much of it exists only through oral myths and legends passed generation to generation. History has been more clearly recorded only since the 7th century after Master Thonmi Sambhota developed the standard Tibetan script and Buddhism was established in Tibet. For this reason, much of Tibetan history I’d viewed from a Buddhist perspective.