The Allahabad Pillar Inscription is a significant historical source from the Gupta period. It is primarily a Prashasti (eulogy) for the Gupta Emperor Samudragupta, detailing his military conquests and administrative achievements. The inscription was composed in Sanskrit by Harisena, who was a court poet and minister (Sandhivigrahika - minister for peace and war) in Samudragupta's court. It is written in the Champu style (mix of prose and poetry).