He headed the Nirmohi Akhara, founded in the 1700s , and one of the 14 monastic orders recognised by the Akhil Bharatiya Akhara Parishad, which is the apex body for such orders
Last year , Hashim Ansari, the oldest litigant in the case, had died. He was 96.
Mahant Bhaskar Das was admitted to a private medical facility on Tuesday following breathing problems where he later suffered a brain stroke.
Doctors had earlier advised that he be taken to a super-speciality hospital either in Lucknow or Delhi. However, the ageing priest refused to leave the temple town.
All shops in the Hanumangarhi area here have downed their shutters as a mark of respect for Mr Das.
The seer's disciples recalled that he had cordial relations with Hashim Ansari, the other oldest litigant in the case, who passed away in July.