Shri Kashi Vishwanath is also known as Lord Vishweshwar in Puranas. Kashi Vishwanath temple is the most important temple among all the twelve Jyotirlingas. As per the Kashi Khand of Skanda Puran, the temple was constructed by God Vishwakarma and even Ravana (Lord Shankars biggest devotee) contributed in its construction by sending gold from his kingdom Lanka. Temple at its current form was constructed by Maharani Ahilya Bai of Indore in 1773.
Kashi Vishwanath Temple or Kashi Vishwanath Mandir is one of the most renowned temples of Lord Shiva, situated in the holy city of Varanasi (also known as Banaras or Benares), in the Eastern part of Uttar Pradesh state of India. Kashi Vishwanath Temple is also one of the 12 Jyotirlingas Shrines of Lord Shiva. It is said that the benefits gained by the darshan of other Jyotirlingas in various parts of India, goes to the devotee by a single visit to Kashi Vishwanath Temple. The main deity is known as Vishwanatha or Vishweshwara, which means the Ruler of the Universe. Situated on the western bank of the river Ganges, the temple is visited by millions of devotees to get blessings and devout peace. Kashi Vishwanatha Jyotirlinga Temple is sometimes referred as the Golden Temple because of the 15.5m high golden spire which adorns the temple, similar to the Sikh Gurudwara at Amritsar.
Varanasi is also famed for being one of the Shakti Peethas of India. It is said that the left hand of Sati fell at Varanasi. Goddess Annapurna or Visalakshi signifies the Shakti Peetham here.
According to Kashi Khand (Chapter 99), after the construction of the palace of Lord Vishwanath (Kashi Vishwanath temple), when Lord Shiva along with Goddess Parvati entered in it, at that time all Gods and Goddess appeared to honour Lord Shiva. On this occasion Lord Shiva, stating the glory of the Kashi Vishwanath Jyotirlinga said
All the self manifested Lingas of the universe come here to take the holy glimpse of this Linga, though I reside in all the Lingas but this Linga is my best statue.
This Linga, if offered a sacred bath of holy water of river Ganga and worshiped with devotion, the worshiper is blessed with all types of Health, Wealth and happiness and gets freedom from the eternal cycle of rebirth and any food offered to this Linga provides a stay at Kailash Parvat with me to the number of Yugas equivalent to the number of particles offered in the Bhog Food.
By touching the Vishweshwar Ling and praying, the devotee gets free from all sins accumulated over past two generations.
A devotee who, with pure devotion, pours holy water on the Linga and offers just one flower to Lord Vishweshwar, gets the blessings equivalent to performing a pooja with hundreds of Golden Flowers.