The Kingdom of Sitawaka (Sinhala: සීතාවක) was a kingdom located in south-central Sri Lanka. It emerged from the division of the kingdom of Kotte following the Spoiling of Vijayabahu in 1521, and over the course of the next seventy years came to dominate much of the island. Sitawaka also offered fierce resistance to the Portuguese, who had arrived on the island in 1505. Despite its military successes, Sitawaka remained unstable, having to contend with repeated uprisings in its restive Kandyan territories, as well as a wide-ranging and often devastating conflict with the Portuguese. Sitawaka disintegrated soon after the death of its last king Rajasimha I in 1594.