Seven major pillar edicts have been found at Lauriya-Araraj, Lauriya Nandangarh, Rampurva, Nigali Sagar, Sarnath, Topra, and Meerut. Ashokan pillars probably signify the axis of the world (axis mundi) that separated heaven and earth.
Samudragupta court poet and minister Harisena composed the Allahabad pillar Inscription or Prayag Prasasti. The Pillar was an Asokan Pillar erected by Asoka six century before him.This Inscription is a eulogy of Samudragupta and mentions about the conquests of Samudragupta and boundaries of the Gupta Empire. As per this inscription, Samudragupta defeated 9 kings in North, 12 Kings in South, reduced all the Atavika states to vassalage.
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