 Known as Govardhan or Giriraj and being the sacred center of Braj, it is identified as a natural form of Krishna.Indian art overwhelmingly prefers the iconic image, but some aniconism does occur in folk worship, early Buddhism, Shiva's Banalinga, and Vishnu's Saligrama Sila (murthi)).They have solar significance, and their use in worship predates the Hindu period in India.