Thirumanthiram is one of the ten Tamil Shaivite Thirumurai texts. It was written by saint Sage Thirumular.
Thirumanthiram belongs to Shaiva Tantrism (a school of Hindu Philosophy). The text is divided into nine chapters.
Thirumanthiram deals with various topics like yoga, procedures for worship and gives description of spiritual concepts. It also details on ‘holy ash.' There is also a description on 'Tatvamasi'(one of the 6 great sayings of Hinduism).