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Vivekananda founded the Ramakrishna Math and the Ramakrishna Mission. He is perhaps best known for his speech which began with the words - "Sisters and brothers of America ...," in which he introduced Hinduism at the Parliament of the World's Religions in Chicago in 1893.
Swami Vivekananda, born Narendranath Datta, was an Indian Hindu monk, a chief disciple of the 19th-century Indian mystic Ramakrishna.