Following the Mudalur pattern, Rhenius started several Christian satellite villages, including Neduvilai (later known as Megnanapuram) (1825), Idayankulam (1827), Asirvathapuram (1828), Nallur (1832) and Surandai (1833).
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Vedha Muthu, was the first Protestant Christian in the Megnanapuram Circle.
The imposing steeple, 192 ft high, was added in 1868, the coping stone being fixed by Lord Napier.