Swami Vivekananda 12 January 1863 – 4 July 1902), born Narendranath Datta , was an Indian Hindu monk. He was a chief disciple of the 19th-century Indian mystic Ramakrishna. He was a key figure in the introduction of the Indian philosophies of Vedanta and Yoga to the Western world, and is credited with raising interfaith awareness, bringing Hinduism to the status of a major world religion during the late 19th century. He was a major force in the contemporary Hindu reform movements in India, and contributed to the concept of nationalism in colonial India. 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 Worlds Religions in Chicago in 1893.