Seruvila Mangala Raja Maha Viharaya, Buddhist temple in Trincomalee District, Sri Lanka.

Seruvila Mangala Raja Maha Viharaya is a Buddhist temple in Trincomalee District, eastern Sri Lanka. Its white stupa has a ribbed dome rising to a square box section and a tapered conical spire with a small finial. A low stone railing and a short flight of steps stand before it, with trees and palms framing the structure.

King Kavantissa founded this religious center in the 2nd century BC, making it one of the sixteen principal Buddhist shrines in Sri Lanka. The temple was expanded and restored over centuries, maintaining its spiritual importance in the region.

The temple houses the Lalata Dathun Wahanse, a forehead bone relic of Buddha, which attracts pilgrims throughout the year for religious ceremonies. Devotees come here to participate in traditional Buddhist rituals and express their reverence across the different shrines within the complex.

The land route runs about 45 km from Kantale via Allai; the sea route starts with a boat from Trincomalee to Muttur, then 16 km of side roads. A third approach follows the Somawathiya–Seruwila road through dense forest. The site lies in Trincomalee District, Eastern Province.

The site is identified with Tissamaharama, where sources record 12,000 arhats once lived; some archaeologists accept this identification. The Lalata Dhatu, the largest relic of the Buddha, is enshrined here, and the site is the only one to hold it.