Sri Guru Nanak Dev Ji (15 April 1469 – 22 September 1539) was the creator of Sikhism, and the first of the ten Sikh Gurus. The last Guru said that there would be no more Gurus after him and Sikhs would be taught by the Sikh holy book, which is called Guru Granth Sahib Ji. The word "Guru" means "teacher" in many Indian languages.