traditional houses were also built per ancient text on an architecture called Vaastu Shastras. Each temple has its own tank called oorani where water lilies are grown and used for holy rituals. Even today, much of Chettinad's daily activities are centered around the festivities of the temple. Among the many famous temples are: Vairavan Kovil, Iraniyur, Karpaga Vinayakar, Kundrakudi Murugan, Kottaiyur Sivan, and Kandanur Sivan temples, with each having its own unique deity. Vinayagar Chathurthi is celebrated every year, on the day when the two stars Shasti and Sadhayam mingle together. This day typically falls as the 22nd day after Periya Karthigai. Pillaiyar Nonmbu, its name, is usually in the month of December. On this day, they sing songs of the deity Lord Vinayagar and then take a sweet called Ellai. Local crafts Sari The cotton sari, also known as kandaangi, is unique in its dramatic patterns and colors. Its vibrance and weight are its distinguishing factors. Records and old photographs show the use of sari by previous generations, before the advent of blouses and underskirts, and thus worn rather differently from the typical contemporary sari. At present, it is available in Kundi Aathangudi tiles Athangudi tiles, named after the place of the manufacture in Chettinad, come in a myriad of colours and patterns, and are made by a unique process using local soil and glass plates. These tiles are a testament to the rich cultural heritage of the Chettiar community, who effectively adapted many influences to their own brand of local craftsmanship. The designs and colours used in Athangudi tiles are still those of a bygone era. However, of late, new designs and patterns are being incorporated. The Athangudi tiles are hand-made. However, with a short shelf life and relatively slow manufacturing process, these tiles are not much in demand. The situation has led to the decline in the market. Industry Chettinad's principal town, Karaikudi is also the location of a branch of the Central Electro Chemical Research Institute (CECRI), one of the forty national laboratories under the aegis of the Council of Scientific and Industrial Research (CSIR) in New Delhi. The CSIR lab specializes in electro-chemical research and has been operational for more than fifty years. The campus is on over 300 scenic acres, filled with traditional and ornamental vegetation. CECRI conducts four-year Engineering and Technology courses in chemical and electro-chemical engineering and technology affiliated with the Anna