Martyr Devasagayam Teacher Training Institute, Unnamalaikadai is managed under the Roman Catholic Diocese, Kottar. The Diocese was established in 1930.

Its affiliated to Thiruvalluvar University.

It is a leading Christian minority Educational agency in Kanyakumari District, Tamilnadu with 53 primary schools, 27 middle schools, 17 high schools, 15 higher secondary schools, 2 matriculation higher secondary schools, 2 Industrial Training Institutes, One Polytechnic College, One Engineering College, 2 community colleges, College of Education and one Teacher Training Institute.

The Diocese of Kottar is contributing in an enormous way in the field of education, serving Catholics and all people without distinction of caste or creed.

These institutions excel other educational institutions of the district in number of students as well as in the quality of service rendered therein.