C. Advaita Prabhu (Advaitacarya)
Advaitacharya appeared some sixty years before Lord Chaitanya's own advent. He was the first among the associates of Lord Caitanya to appear within the material world to deliver the conditioned souls. It was Advaitacarya who asked Lord Chaitanya to descend. Before Lord Chaitanya's advent, Advaitacharya had already begun chanting Krishna's names in the streets with devotees and discussing scriptures on devotional service to Krishna. Advaitacharya's name indicates that He is nondifferent (advaita) from Lord Hari (Krishna), and He is called acharya (spiritual master) because He taught bhakti. Advaitacharya lived in Shantipura and Mayapura, in what is now West Bengal, and was the head of the Vaishnava community of Nadia.