Thillai Natarajah Temple, Chidambaram (Chidambaram Thillai Natarajar-Koothan Kovil or Chidambaram temple) is a Hindu temple dedicated to Shiva located in the town of Chidambaram, East-Central Tamil Nadu, South India. The temple is known as the foremost of all temples (Kovil) to Saivites and has influenced worship, architecture, sculpture and performance art for over two millennium. The temple is referred to in all devotional literature as Bhooloka kailasam, or kailasam, the Lord Shiva's abode that manifests on earth. The Sangam classics list chief architect Viduvelvidugu Perumtaccan as directing an early renovation of the shrine.

A major shrine of Shiva worship since the classical period, there have been several renovations and offerings to Chidambaram by the Pallava, Chola, Pandya, Vijayanagara and Chera royals in the ancient and pre-medieval periods. The temple as it stands now is mainly of the 12th and 13th centuries, with later additions in similar style. Its bronze statues and stone sculptures depicting various deities and the famous Thillai trees (Excoecaria agallocha) of the surrounding forest reflect the highpoints of early Chola and Pallava art while its famed gold plated gopuram towers are medieval structural additions by the royals Aditya I, Parantaka Chola I, Kopperunchinga I, Krishnadevaraya and Jatavarman Sundara Pandyan. King Kocengannan Chola was born following prayers his parents offered at the temple and later in his life he refined its structure. The shrine gave the town its name.