Swami Vivekananda was born in 12 January 1863 – 4 July 1902. His actual name was Narendranath Dutta. He was the disciple of Ramakrishna Paramahansa. Ramakrishna Paramahansa was a founder of the Ramakrishna Math and the Ramakrishna Mission. Swami is well known for his speech (Sisters and Brothers of America) in Chicago. In the year 1893, first time from India he has he introduced Hinduism at the Parliament of the World’s Religions at Chicago.
Here you can find a short video about Swami Vivekananda’s life. This video is from Bharat Ek Khoj.