It is believed that St. Thomas visited Irapeli and converted a prominent families into christianity and laid a cross on the banks of the Meenachil River. Local traditions also support this belief. This is the first church in the Palai diocese and was built in the 1st century. St. Thomas founded seven and a half churches there. (He laid a cross at Irapoli making the church of Irapeli the half church.) It is reported that the church was rebuilt once or twice before the 16th century. The ancient churches were constructed and maintained by the prominent families in the area until the 16th century. In the beginning of the 16th century a new church was built under the leadership of Kallarackal Kathanar by the prominent families. The church was first dedicated to the Assumption of Saint Mary. In the 14th century when either the Nilackal Church or the Chayal Church founded by St. Thomas was destroyed, several families migrated to Irapeli bringing with them a statue of St. George. Gradually the church itself was re-dedicated to Saint George.