Shiv Linga
The frame of the cosmic reality, according to ancient Hindu thought, consists of the three fundamental states called evolution (Shrishthi), existence (sthiti), and involution (samhara) that acts in a cyclic process of infinity. Each one of the forms is controlled by a God, named Brahma (the creator), Vishnu (the preserver) and Siva/Shiva (the destroyer); these three Gods are called the Trinity. Shiva, being the last to complete the cycle from where the new cycle starts, is known as Mahadeo, the Supreme Divinity. The iconographic form of the Shiva, the Linga represents the unity of the three states of cosmos (shown in above figure).The Linga consists of the three parts. The first is a square base of three-layers at the bottom showing the three mythical realms (lokas), symbolizing evolution the place of Brahma. The second is an octagonal round form in the middle showing the eight directions, symbolizing existence or perseverance the place of Vishnu; and third is a cylinder at the top with a spherical end, symbolizing involution or completion of the cosmic cycle the place of Shiva. This icon shows the supreme state of integrity, the ultimate form of Shiva linga itself is a symbol of cosmic mandala. As Sadasiva (eternal reality) Shiva is represented as linga, standing also for 'total knowledge'. As Rudra, the destroyer, his consort is Kali. As Bhairava, the terrible destroyer, his consort is Durga. As a jovial god living in the Himalaya his wife is Parvati. As possessor of all forms of divine power Shiva rooms at the bottom of everything that is moving, that is how he is called Ishvara, derived from I-cara, i.e. I the centre, and cara, the rhythm of movement. Shiva is also depicted as cosmic dancer, Tandava Nartakari, the one who keeps up the rhythm of the world in cosmos.
Standing on the western bank of India's holiest river Ganges, Varanasi is the oldest surviving city of the world and the cultural capital of India. It is in the heart of this city that there stands in its fullest majesty the Kashi Vishwanath Temple in which is enshrined the Jyotirlinga of Shiva, Vishweshwara or Vishwanatha. Here gravitate the teeming millions of India to seek benediction and spiritual peace by the darshan of this Jyotirlinga which confers liberation from the bondages of maya and the inexorable entanglements of the world. A simple glimpse of the Jyotirlinga is a soul-cleansing experience that transforms life and puts it on the path of knowledge and bhakti. Vishweshwara Jyotirlinga has a very special and unique significance in the spiritual history of India. Tradition has it that the merits earned by the darshan of other jyotirlinga scattered in various parts of India accrue to devotee by a single visit to Kashi Vishwanath Temple. Deeply and intimately implanted in the Hindu mind, the Kashi Vishwanath Temple has been a living embodiment of our timeless cultural traditions and highest spiritual values. The Temple has been visited by all great saints- Adi Shankaracharya, Ramkrishna Paramhansa, Swami Vivekanand, Goswami Tulsidas, Maharshi Dayanand Saraswati, Gurunanak and several other spiritual personalities. The Kashi Vishwanath Temple attracts visitors not only from India but abroad as well and thereby symbolises man's desire to live in peace send harmony with one another. Vishwanath being a supreme repository of this spiritual truth thus strengthens the bonds of universal brotherhood and fellow feeling at the national as well as global levels. On January 28, 1983 the temple was taken over by the Govt. of Uttar Pradesh and it's management ever since stands entrusted to a Trust with Dr. Vibhuti Narayan Singh. Former Kashi Naresh, as president and an Executive Committee with Divisional Commissioner as Chairman. The Temple in the present shape was built way back in 1780 by Late Maharani Ahilya Bai Holkar of Indore. In the year 1785 a Naubatkhana was built up in front of the Temple by the then Collector Mohd. Ibrahim Khan at the instance of Governor General Warren Hastings. In 1839, Two domes of the Temple were covered by gold donated by Punjab Kesari Maharaja Ranjeet Singh. Third dome still remains uncovered, Ministry of culture & Religious affairs of U.P. Govt. is taking keen interest for gold plating of third dome of Temple.
Jotirlinga
Worship of shivalinga is considered the prime worship for the devotees of Lord shiva. Worship of all other forms is considered secondary. The significance of the shivalinga is that It is the resplendent light (flame) form of the Supreme - solidified to make the worship of It easier. It represents the real nature of God - formless essentially and taking various forms as It wills.
This jyoti swarUpa of God exist in all the shivalinga forms, there are prominent abodes across Indian subcontinent, where It is in a splendid form. These are renowned as dvAdasa jyotir lingas or 12 jyotirlingas. These are held at much great esteem since the ancient pre-historic times. purANas talk in many sections as well as in detail about the glory of these abodes. Devotees have been getting pulled towards these kshetras due to the highly benevolent divine presence in these abodes, since ancient times.
Legend
As per Shiva Purana, once Brahma (the Hindu God of creation) and Vishnu (the Hindu God of Harmony) had an argument in terms of supremacy of creation. To test them, Shiva pierced the three worlds as a huge endless pillar of light, the jyotirlinga. Vishnu and Brahma split their ways to downwards and upwards respectively to find the end of the light in either directions. Brahma lied that he found out the end, while Vishnu conceded his defeat. Shiva appeared as a second pillar of light and cursed Brahma that he would have no place in ceremonies while Vishnu would be worshiped till the end of eternity. The jyotirlinga is the supreme partless reality, out of which Shiva partly appears. The jyothirlinga shrines, thus are places where Shiva appeared as a fiery column of light. There are 64 forms of Shiva, not to be confused with Jyotirlingas. Each of the twelve jyothirlinga sites take the name of the presiding deity - each considered different manifestation of Shiva. At all these sites, the primary image is lingam representing the beginningless and endless Stambha pillar, symbolizing the infinite nature of Shiva. The twelve jyothirlinga are Somnath in Gujarat, Mallikarjuna at Srisailam in Andhra Pradesh, Mahakaleswar at Ujjain in Madhya Pradesh, Omkareshwar in Madhya Pradesh, Kedarnath in Himalayas, Bhimashankar in Maharashtra, Viswanath at Varanasi in Uttar Pradesh, Triambakeshwar in Maharashtra, Vaidyanath Jyotirlinga, Deogarh in Deoghar, Jharkhand, Nageswar at Dwarka in Gujarat, Rameshwar at Rameswaram in Tamil Nadu and Grishneshwar at Aurangabad in Maharashtra.
The Manikarnika Ghat on the banks of Ganges near to the Kashi Vishwanath Temple is considered as a Shakti Peetha, a revered place of worship for the Shaktism sect. The Daksha Yaga, a Shaivite literature is considered as an important literature which is the story about the origin of Shakti Peethas