Lesser known facts about Trichy’s Rock Fort

Tiruchirappalli’s Rockfort is a historic fortification and temple complex built on an ancient rock. The fort is constructed on an 83 metres (272 ft) high rock.


  • The rock is one of the oldest formations in the world.
  • The rock is 3.8 billion years old (380 crore years old), making it as old as the rocks in Greenland and older than the Himalayas.
  • There are two Hindu temples inside, the Ucchi Pillayar Temple and the Thayumanaswami Temple.
  • The oldest structure in the fort is a cave temple built by the Pallavas in 580.
  • Madurai Nayaks constructed the Rock Fort Temple Lake.
  • The Pallavas initially built the Ucchi Pillayar temple, but the Nayaks made use of its naturally fortified position and designed it again.