It is estimated that 11,000 such mansions still remain—about half the number that existed 100 years ago. They were built by men who once traded in everything from salt to gems, with countries like Burma, Malaysia and Singapore. Much of their profits went into building these grand residences, which used to be called natukottai or regional fort. But in the mid-20th century, most Chettiar families moved to cities. Their palatial homes were left in the custody of caretakers, who maintained them for those rare occasions, such as weddings or Pongal, the Tamil harvest festival, when the family came to visit. Visit few mansions open for tourist like Chettinadu Mansions, Chettinad Palace and few Chettinad Temples like Vairavan Kovil Temple, Karpaga Vinayakar temple, Kundrakudi Murugan temple, Kottaiyur Sivan temple.