Kashi Vishwanath temple is located in the city of Banaras i.e. Varanasi i.e. Kashi in the state of Utter Pradesh. Precisely speaking it is on the west bank of the great river Genges and is one of the most popular of Jyotirling of lord Shiva and perhaps the most sacred of Hindu shrines, where at least once in life a Hindu is expected to do pilgrimage, and if possible, also pour the remains of cremated ancestors on the River Ganges.
The main deity is known by the name Vishwanath (Shiva) meaning Ruler of the universe. The town claims to be the oldest living city in the world (about 3500 Yrs).