And before his death, he names Guru Angad, who is not his son, as his successor. After Guru Angad, you have Guru Amardas, and then you have Guru Ramdas, who establishes the city now sacred to Sikhs known as Amritsar, originally known as Ramdaspur. Guru Ramdas is succeeded on his death by Guru Arjan, and Guru Arjan is significant for many reasons. He creates the compilation known as the Adi Granth, which are the sayings and the hymns of the previous gurus, including his own. The Adi Granth, as we will see, will eventually evolve into the Guru Granth Sahib, which is considered not only the Sikh holy book, but also the last and final of the gurus. In Ramdaspur, later to be known as Amritsar, Guru Arjan builds the Harmandir Sahib, which is intended to be a place of worship for people of all religions. They have a tradition of langar, where they feed anyone who comes from any faith.