Alaungsithu or Sithu I (Burmese: အလောင်းစည်သူ [ʔəláʊɴ sìθù]; also Cansu I; 1090–1167) was king of Pagan Dynasty of Burma (Myanmar) from 1112/13 to 1167. Sithu's reign was a prosperous one in which Pagan was an integral part of in-land and maritime trading networks.