It is the oldest surviving municipal corporation in India and the second oldest surviving corporation in the world.[126][127] In 2011, the jurisdiction of the Chennai Corporation was expanded from 174 km2 (67 sq mi) to an area of 426 km2 (164 sq mi),[128] dividing into three regions—North, South and Central, which covers 200 wards.[129][130] The corporation is headed by a mayor, an office presently occupied by Saidai Sa.