Gurdwara Sis Ganj Sahib was built to commemorate the martyrdom of Guru Teg Bahadur. It is situated in Chandni Chowk, on the same site where Mughal Emperor Aurangzeb ordered the beheading of Sikh Guru Tegh Bahadur in the year 1675. It is said that when Guru Tegh Bahadur died, no one had the courage to pick up his body. Suddenly, it started raining heavily. Then, two of the brave followers of Guruji took his head and body and fled. The head was taken to Chakk Nanaki in Anandpur Sahib, while the body was taken to the place where Gurdwara Rakab Ganj Sahib now stands.
After almost a century, Baba Baghel Singh, a devotee of Guru Teg
Bahadur, discovered the site where Guruji was beheaded. He was the one
who built the Sisganj Gurdwara, in New Delhi, there. Even today, the
trunk of the banyan tree under which the Guru was martyred can be seen
at the Gurudwara. The well where Guruji took his daily bath, while being
imprisoned, also stands at the Delhi Sis Ganj Gurdwara. Then, there is
the enclosed structure where Guruji was held captive as a prisoner
before his beheading. Guru Gobind Singh Sahib also visited this holy
place in the year 1702.