Chennai, with historically rich records dating at least from the time of the Pallavas, houses 2,467 heritage buildings within its metropolitan area (CMA), the highest within any Metropolitan Area limit in India. Most of these buildings are around 200 years old and older. Some of them are Chennai Central, Chennai Egmore, Ripon Building, Senate House, Bharat Insurance Building, and so forth. Chennai is home to the second largest collection of heritage buildings in the country, after Kolkata. The official list of heritage buildings was compiled by the Justice E. Padmanabhan committee. The Tamil Nadu Assembly passed the Heritage Commission Act in 2012 to preserve old heritage structures.