Scholars such as Fleming and Eck state that the post-Epic era literature from the 1st millennium CE amply demonstrate that there was a historic concept of the Indian subcontinent as a sacred geography, where the sacredness was a shared set of religious ideas. For example, the twelve "Jyotirlingas" of Shaivism and fifty-one "Shaktipithas" of Shaktism are described in the early medieval era Puranas as pilgrimage sites around a theme. This sacred geography and Shaiva temples with same iconography, shared themes, motifs and embedded legends are found across India, from the Himalayas to hills of South India, from Ellora Caves to Varanasi by about the middle of 1st millennium. Shakti temples, dated to a few centuries later, are verifiable across the subcontinent. Varanasi as a sacred pilgrimage site is documented in the "Varanasimahatmya" text embedded inside the "Skanda Purana", and the oldest versions of this text are dated to 6th to 8th-century CE.