The Besnagar Pillar inscription was discovered in 1874 in Besnagar, near Vidisha, India. It describes a pillar erected by Heliodorus, a Greek ambassador from Taxila, in honor of the god Vishnu. The inscription is written in Brahmi script dating to the 2nd century BCE. It provides insights into religious and political relations between Indo-Greek kings and Indian rulers at the time, such as the popularity of Vaishnavism and contact between the regions of Taxila and Vidisha. The pillar's architecture also reflects Persian and Indian design influences.