This is a list of historical diplomatic missions, travellers, and pilgrims dispatched from Sri Lanka, spanning from the antiquity of the Anuradhapura period to early modern Sri Lanka. Positioned along major trans-Indian Ocean trade routes Sri Lanka served not only as the paramount center for Theravada Buddhism but a hub in a global network of trade and diplomacy. The Indian Ocean island leveraged its position equidistant between East Asia, the Middle East, and East Africa to function as a commercial emporium and maritime entrepôt astride major trans-oceanic trade routes. The Sinhalese monarchs pursued an active, sophisticated, and selective foreign policy designed to safeguard sovereign independence, expand international commerce, and foster enduring cultural links across the known world, regularly dispatching royal emissaries, monastic delegations, trade envoys, and tribute-bearing embassies to countries as far as East Asia and Western Europe. The Periplus of the Erythraean Sea, a 1st century Periplus mentions Taprobane as a trading emporium for elephants, gems, and spices.
State-sponsored diplomacy was initiated in the 3rd century BCE, when Dēvānaṃpiya Tissa dispatched a diplomatic mission to Pataliputra led by his chief minister and nephew, Mahā-Ariṭṭha seeking to establish formal relations with Emperor Ashoka of the Mauryan Empire. The Sinhalese monarch requested royal consecration regalia, and appealed to the emperor to embrace the Buddhist faith. Following this diplomatic exchange, the Emperor dispatched his children, Mahinda Thero and Sanghamitta Theri to the Sinhalese court leading to the establishment of Buddhism as the island's premier religion, which subsequently served as a enduring inspiration for foreign relations and was later transmitted by Sri Lankan monastic missions to Southeast Asian kingdoms such as Myanmar, Thailand, and Cambodia.
Key foreign destinations included empires of the Indian subcontinent, imperial China across successive dynasties, the Roman Empire, Islamic caliphates of the Middle East, and the Southeast Asian polities. Overseas missions were undertaken to cultivate trade agreements, secure political and military alliances against foreign aggression, exchange cultural and scientific knowledge, and preserve or restore Buddhist monastic lineages (Upasampadā). This list details recorded outward embassies as documented in indigenous Sri Lankan chronicles, foreign imperial annals, epigraphical records, and European archival sources.
List of missions Year Sri Lankan monarch Envoys Foreign recipient CommentsAnuradhapura period (377 BCE–1017 CE) c. 3rd century BCE Devanampiya Tissa Royal delegation led by Mahā-Ariṭṭha Ashoka