known compositions written by Naraharitirtha, a prominent disciple of Madhvacharya. The Vaishnava Bhakti (devotional) movement involving well-known haridasas (devotee saints) of the 14th through 16th centuries made an indelible imprint on Kannada literature, with the development of a body of literature called ("Haridasa literature"). This philosophy presented another strong current of devotion, pervading the lives of millions, similar to the effects of the Veerashaiva movement of the 12th century. The haridasas conveyed the message of Madhvacharya through esoteric Sanskrit writings (written by or Vyasa school) and simple Kannada language compositions, appealing to the common man, in the form of devotional songs (written by the or Dasa school). The philosophy of Madhvacharya was spread by eminent disciples such as Naraharitirtha, Jayatirtha, Vyasatirtha, Sripadaraya, Vadirajatirtha, Purandara Dasa, Kanaka Dasa and others. Compositions in the haridasa literature are sub-divided into four types: , , and . are devotional musical compositions with refrains based on raga and and celebrate the glory of god. The are tala based, the are melody based while the are in the form of riddles. Compositions were also modelled on (lullaby songs) and (marriage songs). A common feature of haridasa compositions are influences from the Hindu epics, the Ramayana, the Mahabharata and Bhagavata. Haridasa poetry, which faded for a century after the death of Naraharitirtha, resurfaced with Sripadaraya, who was for some time the head of the Madhva matha (monastery of Madhvacharya) at Mulubagilu (in modern Kolar district). About a hundred of his have survived, written under the pseudonym "Sriranga Vithala". Sripadaraya is considered a pioneer of this genre of devotional songs. Sripadaraya's disciple, Vyasatirtha (or Vyasaraya), is most famous among the latter day Madhva saints. It was he who created the and schools within the Madhva order. He commanded respect from King Krishnadeva Raya, who honoured him with the title (family god). A poet of merit in Kannada and the author of seminal works in Sanskrit, Vyasatirtha was the guru responsible for shaping the careers of two of Kannada's greatest saint-poets, Purandara Dasa and Kanaka Dasa. Another prominent name in the age of (devotee) literature is Vadirajatirtha, a contemporary of Purandara Dasa and the author of many works in Kannada and Sanskrit. Purandara Dasa (1484–1564), a wandering bard who visited Vijayanagara during the reign of King Achyuta Raya, is believed to have composed 475,000 songs in the Kannada and Sanskrit languages, although only about 1,000 songs are known today.