 Bhakti poets or teachers such as Manavala Mamunigal, Namdev, Ramananda, Surdas, Tulsidas, Eknath, Tyagaraja, Chaitanya Mahaprabhu and many others influenced the expansion of Vaishnavism.Even Meera bai(princess of Mehwar and Rajasthan)took part in this specific movement.These Vaishnavism sampradaya founders challenged the then dominant Shankara's doctrines of Advaita Vedanta, particularly Ramanuja in the 12th century, Vedanta Desika and Madhva in the 13th, building their theology on the devotional tradition of the Alvars (Shri Vaishnavas).In North and Eastern India, Vaishnavism gave rise to various late Medieval movements Ramananda in the 14th century, Sankaradeva in the 15th and Vallabha and Chaitanya in the 16th century.