Thirumurai ( Tamil: திரு முறை, meaning holy division) is a twelve volume compendium of songs or hymns in praise of Shiva in the Tamil language from the 6th to the 11th century by various poets in South India. Nambi Andar Nambi compiled the first seven volumes by Appar, Sampandhar and Sundarar as Tevaram during the 12th century. During the course of time, a strong necessity was felt by scholars to compile Saiva literature to accommodate other works. Tiruvacakam and Tirukovayar by Manickavasagar are included as the eighth, nine parts are compiled as the ninth Tirumurai out of which most are unknown, and the tenth as Tirumandiram by Tirumular, the famous Siddhar. The eleventh is compiled by Karaikal Ammaiyar, Cheraman Perumal and others. The contemporary Chola king was impressed by the work of Nampi and included Nampi's work in the eleventh Tirumurai. Sekkizhar's Periya Puranam, composed a century later, contains the life depiction of all the 63 Nayanmars. The response for the work was so tremendous among Saiva scholars and Kulothunga Chola I that it was included as the 12th Tirumurai. Tirumurai along with Vedas and Saiva agamas form the basis of Saiva Siddantha philosophy in Tamil Nadu.