Gurdwara Santokhsar Sahib, adjoining the Harmandir Sahib, is the historical Sikh shrine with one of the five holy tanks that were constructed by Guru Arjan Dev Ji. The excavation of this sacred pool was started by Guru Ram Das Ji, as per the instructions of the then Sikh Guru and his father-in-law, Guru Amar Das Ji. Guru Arjan Dev Ji completed the digging of the bathing tank between 1587 and 1589 with the help of Baba Buddha.
Guru Ram Das Ji named the tank as Santokhsar Sahib after a sage, who was found meditating at the site during excavation. The Yogi, named Santakha, disclosed that he had been waiting for the Guru to give him salvation, and then breathed his last. Also known as Gurdwara Tahli Sahib, this historical shrine is a must visit in Amritsar.