Many ancient Shiva Temples could be witnessed in Kashi. one of them is the Dwareshwar Temple. The importance of this Temple is mentioned in.
Legend
Goddess Parvati was curious about the many Shiv Lings and gods that might be found across Kashi, and Lord Shiva was happy to discuss them (Kashi Khand, Chapter 97).
Along with Dwareshwari Devi, Lord Shiva tells a story about Ling. Worshiping this idol of Lord Shiva will allow devotees to fully benefit from living in Kashi and achieve Siddhi. In other words, they will become endowed with heavenly abilities and achieve Moksha.