The ancient site, known as Raja Harsh-ka-Tila is an extensive mound approx. 1000 m long x 750 m wide. The height of the mound is about 15 to 18 m from the surrounding area.The site was excavated by the Archaeological Survey of India from 1987-88 to 1990-91 and again in 2002-03 and 2003-04. Excavations here, has revealed a sequence of cultures which ranges from the Kushana to the late Mughal period.On the basis of various identifiable remains, the excavations revealed a sequence of six cultural periods. These are the Kushana period (1st-3rd century CE), Gupta period (4th-6th century CE), Post Gupta Period or the Vardhana Period (6th-7thcentury CE) Rajput Period (8th- 12th century CE) and the Mughal Period (16th- 19th century CE).The findings of a few sherds of painted Grey Ware along with associated grey ware, black slipped and red wares in pre-Kushana levels also suggest the inhabitation of the site in the first millennium B.C. The site was fortified from the Kushana to the Mughal period. The significant discovery of post-Gupta period is represented by brick structures associated with Red Polished Ware. Structural remains along with antiquities of the Indo-Islamic period were also exposed including a Mughal period garden complex on the Charbagh pattern.
In view of its historical importance, it was declared protected as a monument of national importance vide notification no. 2334 dated 20.03.1992.