Nedumkotta or Travancore lines was a wall built as a protection against consistent invasions from Mysore during the (de facto) rule of Tipu Sultan. It was built by the Dharma Raja Karthika Thirunal (d.A D 1764), King of Travancore with the request, support and permission of the Kingdom of Kochi. It was constructed by Rama Varma under the supervision of his Commander Eustachius De Lannoy. The work was started in 1762 it was completed only by 1775. The lines consist of a ditch about sixteen feet broad and twenty feet deep with a thick bamboo hedge in it, a slight parapet and good rampart and bastions on rising grounds almost flanking each other from one extreme of the lines to the other. The construction of Nedumkotta or the Travancore Lines is considered to be a unique and unparallel episod