Narendranath Dutta was the birth name of Swami Vivekananda, the chief disciple of Ramakrishna Paramahansa. He founded the Ramakrishna Mission in 1897 and famously represented Hinduism at the Parliament of the World's Religions in Chicago in 1893. Adi Sankaracharya was an 8th-century philosopher, Aurobindo Ghosh was a revolutionary-turned-yogi, and Ramakrishna Paramahansa was Vivekananda's guru.