Srimanta Sankardev (শ্ৰীমন্ত শংকৰদেৱ; , ; 1449–1568) was a 15th–16th century Assamese polymath; a saint-scholar, poet, playwright, dancer, actor, musician, artist social-religious reformer and a figure of importance in the cultural and religious history of Assam, India. He is widely credited with building on past cultural relics and devising new forms of music (Borgeet), theatrical performance (Ankia Naat, Bhaona), dance (Sattriya), literary language (Brajavali). Besides, he has left an extensive literary oeuvre of trans-created scriptures (Bhagavat of Sankardev), poetry and theological works written in Sanskrit, Assamese and Brajavali. The Bhagavatic religious movement he started, Ekasarana Dharma and also called Neo-Vaishnavite movement, influenced two medieval kingdoms – Koch and the Ahom kingdom – and the assembly of devotees he initiated evolved over time into monastic centers called Sattras, which continue to be important socio-religious institutions in Assam and to a lesser extent in North Bengal. Sankardev inspired the Bhakti movement in Assam just as Guru Nanak, Ramananda, Namdev, Kabir, Basava and Chaitanya Mahaprabhu inspired it elsewhere in the Indian subcontinent. His literary and artistic contributions are living traditions in Assam today. The religion he preached is practised by a large population, and Sattras (monasteries) that he and his followers established continue to flourish and sustain his legacy. Biography After the death of Sankardev, Madhavdev incorporated narrations of his life in prayer services, a practice that was followed by his apostles, and in due course of time a large body of biographical literature arose. These are generally classed in two groups: early (those by Daityari Thakur, Bhusan Dwija, Ramananda Dwija and Vaikuntha Dwija) and late (Guruvarnana by Aniruddha Das, the more than one anonymous Katha-guru-carits, Bardowa-carit, Sankardev caritra from Barpeta, the Saru-svarga-khanda and Bar-svarga-khanda by Sarvabhauma). The authorship of the biography credited to Ramcaran Thakur, Daityari Thakur's father, is doubted and it is generally dated to the 17th-century and classed with the late biographies. In general, all biographies consider Sankardev as an incarnation of Vishnu, including that by Daityari Thakur, the earliest. The late biographies differ from the early group on the count that they ascribe supernatural feats to Sankardev, and describe miraculous events; and there is a tendency to read some events of the Bhagavata into his life. The biographies are full of contradictions; even though the earlier ones are considered more accurate, not all they claim are true—Daityari Thakur's biography, the earliest one, claims Sankardev met with Chaitanya, which is