Arunachala other than Lord Arunachaleswara(the or Agni linga) there are Eight lingas around the hill and many spiritually significant places to be seen and worshipped. The other lingas include Indra Lingam: East, Agni Lingam: South East, Yema Lingam: South, Niruthi Lingam: South West, Varuna Lingam: West, Vayu Lingam: North West, Kubera Lingam: North, Esanya Lingam: North East. The three sides of the Second Prakaram we enter by the East into the First Prakaram which encloses the Garbagraha (Sanctum Sanctorum) of Sri Arunachaleswarar, the main deity of the temple. He has got many names. The popular Tamil Name is Annamalaiyar. Other names are Sri Sonachaleswarar, Sri Arunagiriswarar, Sri Sounadriswarar, Sri Bhaktapasavimochakar, Sri Vedamurthi, etc. Tiruvannamalai is very famous for Giri Valam (going around the mountain) which happens on full moon days (Pournami Giri Valam). The hill is considered to be Lord Shiva and thus going around it is to show respect to Lord Shiva.
It is significant to the Hindu sect of Saivism as one of the temples associated with the five elements, the Pancha Bhoota Stalas, and specifically the element of fire, or Agni. Shiva is worshiped as Annamalaiyar or Arunachaleswarar and is represented by the lingam, with his idol referred to as Agni lingam. His consort Parvati is depicted as Unnamulai Amman. Out of all the four brahmotsavas, the one which is celebrated in the month of November or December is considered to be more auspicious and is celebrated for almost 10 days.
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