This change is apparent in the writings of the Hoysala court poets, some of whom are noted for pioneering works in native metres. The Veerashiava poet Harihara, one of the most prominent poets of the medieval era, established the "ragale" tradition with his biography of Basavanna ("Basavaraja Devara ragale", 1160), the earliest available biography of the social reformer and of the Kannada language as well. His nephew Raghavanka established the "shatpadi" metre in his unique and original narration of the story of King Harishchandra called "Harishchandra Kavya" (1200). Sisumayana is credited with introducing a new composition called "sangatya" (1232) in his allegorical poems "Tripuradahana" ("Burning of the triple fortress") and "Anjanacharita". Some Jain authors continued the "champu" tradition, such as Janna, immortalised by his writing "Yashodhara Charite" (1207), a unique set of stories in 310 verses dealing with sadomasochism and transmigration of the soul. The earliest well-known Brahmin writers also emerged during the late 12th century and wrote on themes ranging from Vaishnava faith (Rudrabhatta's "Jagannatha Vijaya", 1185) to secular treatises on poetics (Kavi Kama's "Sringara Ratnakara", on poetic sentiment and flavor).