About Mannar
Mannar is a small business town in Chengannur Taluk near to Veeyapuram and Haripad in Alappuzha District of Kerala state, India, on State Highway 6. It is also known as the Bell Metal Town.
Mannar was the venue for the famous Treaty of Mannar ( Mannar Harmony Deed) signed between Maharaja of Travancore Marthanda Varma and Kayamkulam King in 1742. After this deed Kayamkulam and a major portion of central travancore became the part of Travancore Kingdom.
Source : Wikipedia