The present-day site of Bairat corresponds to the ancient city of Virāṭanagara, which was the capital of the Iron Age Matsya kingdom (c. 1400-c. 350 BC), which was one of the solasa (sixteen) Mahajanapadas (great kingdoms) according to the 6th BCE Buddhist text Anguttara Nikaya.

Matsya kingdom had Kuru and Surasena mahajanapadas to its north and east respectively.

The ruins of the Bijak-ki-pahadi (Bairat Temple), a Buddhist Chaitya (chapel) from the 3rd century BCE located in Bairat, are the oldest free-standing Buddhist structures in India.

However, Akhnoor, a town in the union territory of Jammu and Kashmir is also considered by many as the ancient Virat Nagar.

[5][6] The town has a number of Mughal structures, including a Chhatri (cenotaph) with some of the earliest surviving murals in Rajasthan, and a lodge where the Mughal emperor Akbar hunted and stayed overnight on his yearly pilgrimage to Ajmer.