 But Guru Nanak's son saved the urn containing his ashes and reburied it on the left bank of the river, where a new habitation was formed, representing the present day Dera Baba Nanak.At the location Guru Nanak is believed to have died, the Gurdwara Kartarpur Sahib was built.It is considered to be the second holiest site for the Sikh religion.