The Sikh Gurus are the spiritual masters of Sikhi, who established this religion over the course of about two and a half centuries, beginning in 1469. The year 1469 marks the birth of Guru Nanak, the founder of Sikhism. He was succeeded by nine other gurus until, in 1708, the Guruship was finally passed on by the tenth guru to the holy Sikh scripture, Guru Granth Sahib, which is now considered the living Guru by the followers of the Sikh faith. Guru Nanak (1469-1539), Guru Angad (1504-1552), Guru Amar Das (1479-1574), Guru Ram Das (1534-1581), Guru Arjan (1563-1606), Guru Hargobind (1595-1644), Guru Har Rai (1630-1661), Guru Har Krishan (1656-1664), Guru Tegh Bahadur (1621-1675), Guru Gobind Singh (1666-1708).