Bell tower
The seven storey Belfry or Bell tower (125 feet) of the church is said to be the tallest structure in South India when it was constructed. The huge three bells in the bell tower were imported from Marseilles in France (1883–1892) in 19th century and is one of biggest bells in Kerala. The bells are inscribed with the pictures of Jesus, Saint Joseph, Mary (mother of Jesus), Saint Anthony, Raphael (archangel) and Tobias. Owned by Ollur church is written in the bells in Syriac language and Malayalam.