The centre of Padanilam  was known as otha varambu. Until the 1980s, there were two "Kalithattu" (a raised square platform fortified with four heavy stones at the borders).
The hub of Padanilam  was designated as otha varambu. Prior to the 1980s, there were two "Kalithattu" (elevated squares bolstered by four massive stones at their perimeters).