Is a form of Lord Shiva and is held in reverence in temples all over the sub continent. The Linga is a symbol.  It is a symbol of that which is invisible yet omnipresent.  It is hence a visible symbol of the Ultimate Reality which is present in us (and in all objects of creation ).

The Shiva Linga denotes the primeval energy of the Creator. It is believed that at the end of all creation, during the great deluge, all of the different aspects of God find a resting place in the Linga; Brahma is absorbed into the right, Vishnu to the left and Gayatri into the heart.