The ancient inscriptions are cut into two large rock boulders and written in the Kharoshthi script. They retain immense historical importance, as they appear to be the first examples of writing in South Asia. They were inscribed during the 3rd Century BC (272-231 BC), during the reign of Ashoka, the famous Mauryan emperor. The rock edicts were added to the UNESCO World Heritage Tentative List on 30 January 2004 in the Cultural category.