Swami Vivekananda was born as Narendranath Datta at the 3, Gourmohan Mukherjee Street residence on January 12,1863 in Kolkata. Born in an affluent family, Swamiji was always intrigued by spirituality and philosophy. When he reached the threshold of youth, he was troubled by doubts about the existence of God and was thus passing through a period of spiritual crisis. At this time, he met his guru and mentor Sri Ramakrishna. After removing several doubts from Swamiji's mind, Sri Ramakrishna won him over and thus began their guru-disciple relationship. After his guru's death, Vivekananda became the chief disciple of Ramakrishna Paramahamsa and became the founder of Ramakrishna Math and Ramakrishna Mission. Swami Vivekananda played an important role in the spiritual enlightenment of the Indian masses. He was the person who spread Vedanta philosophy in the West and established the Ramakrishna Mission for service of the poor.