Sikhism was established by ten god-inspired prophet-teachers called Gurus over the period from 1469 to 1708. Each Guru added to and reinforced the message taught by the previous, resulting in the creation of Sikhism. Their names were Guru Nanak Dev, Guru Angad Dev, Guru Amar Das, Guru Ram Das, Guru Arjan Dev, Guru Hargobind, Guru Har Rai, Guru Harkrishan, Guru Tegh Bahadur, Guru Gobind Singh.