This soaring Roman Catholic cathedral, a stone's throw from the beach, was founded by the Portuguese in the 16th century, then rebuilt in neo-Gothic style in 1896, and is said to mark the final resting place of St Thomas the Apostle. It's believed 'Doubting Thomas' brought Christianity to the subcontinent in AD 52 and was killed at St Thomas Mount, Chennai, in AD 72. Behind the cathedral is the entrance to the tomb of St Thomas.
Although most of St Thomas' mortal remains are apparently now in Italy, a small cross on the tomb wall contains a tiny bone fragment marked 'Relic of St Thomas'. The museum above displays Thomas-related artefacts including the lancehead believed to have killed him.
St Thomas' Pole, at the beach end of the street on the cathedral's south side, is said to have miraculously saved the cathedral from the 2004 tsunami.