Christianity is a minority religion in Sri Lanka. It was introduced to the island in first century, probably in AD 72. Traditionally, after Thomas the Apostle's visit in Kerala in AD 52, Christianity is said to have been introduced to Sri Lanka because of its close geographical and commercial ties.
Records suggest that St. Thomas Christians and Nestorian Christians lived in Sri Lanka, and the Anuradhapura cross is one of the archaeological finds that suggest Christianity in Sri Lanka before the arrival of the Portuguese. Nestorian Christianity is said to have thrived in Sri Lanka with the patronage of King Dathusena during the 5th century. There are mentions of involvement of Persian Christians with the Sri Lankan royal family during the Sigiriya Period. Over seventy-five ships carrying Murundi soldiers from Mangalore are said to have arrived in the Sri Lankan town of Chilaw most of whom were christians. King Dathusena's daughter was married to his nephew Migara who is also said to have been a Nestorian Christian, and a commander of the Sinhalese army. Maga Brahmana, a christian priest of Persian origin is said to have provided advice to King Dathusena on establishing his palace on the Sigiriya Rock. The Anuradhapura Cross discovered in 1912 is also considered to be an indication of a strong Nestorian Christian presence in Sri Lanka between the 3rd and 10th century in the then capital of Anuradhapura of Sri Lanka. There were also conversions by the Dutch in the 17th century.