 When the sainthood of Thomas Becket (Thomas of Canterbury) was ratified by Rome in 1338, a second dedication was made to him but it did not replace the St Merryn dedication.The first resident Vicar, John de Withiel, was installed on 2 July 1259.The church building is of Norman foundation but the chancel, south aisle and upper part of the tower are of the 15th century.