Complex sentence: The Aayiram Kaal Mandapam or thousand pillar hall is of very high sculptural importance and contains 985 (instead of 1000) magnificiently carved pillars and maintained by the Archaeological Survey of India.
Split into simpler sentences: The Aayiram Kaal Mandapam or Thousand Pillar Hall contains 985 (instead of 1000) carved pillars. It is considered culturally important and is maintained by the Archaeological Survey of India.