(Others include St. Peter's Basilica in Rome, Italy; the Church of Saint James the Great in Santiago de Compostela, Spain.)
And as History a small and simple structure (church) was built over the tomb of Saint Thomas the Apostle by his disciples in AD 72.
The Portuguese explorers came to Mylapore in 1500, they saw the tomb of St.Thomas as a small abandoned structure and they decided to build a church in that same place.
Khan seized Santhome and formed a battle line on the north bank of the Adyar River on 22 October to prevent the French from moving up reinforcements from Pondicherry.
French Governor-General Joseph François Dupleix sent a relief force from Pondicherry that met Khan's army at the Adyar River.
Although the French had only 300 troops, in the Battle of Adyar they executed a bold attack that drove the Nawab's forces into the town.
The official residence of the Archbishop of the Madras - Mylapore Archdiocese is in Santhome adjacent to the Basilica.
The Santhome High Road stretches from the light house side of the famous Marina beach and goes through in front of St. Thomas basilica towards Adyar.