 Later developments led by Ramananda created a Rama-oriented movement, now the largest monastic group in Asia.The Vaishnava tradition has many "sampradayas" (denominations, sub-schools) ranging from the medieval era Dvaita school of Madhvacharya to Vishishtadvaita school of Ramanuja.The tradition is known for the loving devotion to an avatar of Vishnu (often Krishna), and it has been key to the spread of the Bhakti movement in South Asia in the 2nd millennium CE.