At Nagar, about 9 km north-east of Phillaur, in a 5 m cultural deposit, a three fold sequence of cultures was identified. Of these, the lowest Period I is represented by Painted Grey Ware Culture which has a sprinkling of Late Harappan sturdy red ware in it indicating again interlocking of two cultures. Period II is represented by the typical Kushana pottery, terracottas and coins. At the end of this period there is a little early Gupta deposit which is very much disturbed by the medieval pits. In Period III, there was prosperous habitation at Nagar representing the early medieval times.
In view of its historical importance, it was declared protected as a monument of national importance vide Act 1954 dated 02.01.1954.