Swami Vivekanana (Sanskrit: स्वामी विवेकानन्द, Svāmi Vivekānanda) (January 12, 1863 – July 4, 1902), whose pre-monastic name was Narendranath Dutta (Narendranath Dut-tta), was one of the most famous and influential spiritual leaders of the philosophies of Vedanta and Yoga. He was the chief disciple of Ramakrishna Paramahamsa and the founder of Ramakrishna Math and Ramakrishna Mission. He is a major figure in the history of the Hindu reform movements.