Sivagamiyin Sapatham literally ‘The vow of Sivagami’) is a Tamil historical novel written by Kalki, first serialized in kalki during January 1944 – June 1946, and published as a book in 1948. Along with Ponniyin Selvan, this is widely regarded as one of the greatest novels ever written in Tamil. Set in 7th-century south India against the backdrop of various historical events and figures, the novel created widespread interest in Tamil history. Honour, love and friendship are important themes that run through the course of the novel. It is also the prequel story of Parthiban Kanavu also written by Kalki.