The Kingdom of Polonnaruwa was the Sinhalese kingdom that expanded across the island of Sri Lanka and several overseas territories, from 1070 until 1232. The kingdom started expanding its overseas authority during the reign of Parakramabahu the Great.

The Sinhalese monarchy has its origins in the settlement of North Indian Indo-Aryan immigrants to the island of Sri Lanka. The Landing of Vijay as described in the traditional chronicles of the island, the Dipavamsa, Mahavamsa and Culavamsa, and later chronicles, recount the date of the establishment of the first Sinhala Kingdom in 543 BC when Prince Vijaya, an Indian Prince, and 700 of his followers are claimed to have landed on the island of Sri Lanka and established the Kingdom of Tambapanni. In Sinhalese mythology, Prince Vijaya and followers are told to be the progenitors of the Sinhalese people. However according to the story in the Divyavadana, the immigrants were probably not led by a scion of a royal house in India, as told in the romantic legend, but rather may have been groups of adventurous and pioneering merchants exploring new lands.