Tibet has a long history but the written history is more clearly recorded since the seventh century after master Sambhota, invented or developed the standard Tibetan script. The histories about the 32 former kings were probably told orally generation after generation and they are full of mystery and legends. Generally. Tibetan history is divided into five parts. 1. The primitive historic period. 2. The Tsenpo period. 3. Decentralization period. 4. Sakya, Pagdru and Tsanpa king’s period. 5. Ganden Podrang period. During the past thousand of years, the Tibetans have developed a unique culture that has strongly been influenced by the local Bon religion and Buddhism.