The Gyanvapi dispute arose when Hindu devotees approached a civil court claiming the right to worship inside the premises of the Gyanvapi Mosque, on the ground that it was a Hindu temple and still houses Hindu deities.
The civil court ordered a survey of the Mosque by an advocate commissioner. The advocate commissioner then conducted the videographed survey and submitted a report to the civil court.
Based on the survey report, the Hindu parties have claimed that one of the objects discovered at the site is a Shivling while the Muslim parties have disputed the same and said that it is only a water fountain.
Source: Barandbench