Sangni is a small fort located about 60 kilometers to the east of Islamabad, 10 km from Kallar Syedan in district Rawalpindi at 33°22'18.10"N, 73°27'0.38"E. It is a small fort and despite being a structure several centuries old in remarkably good condition. Who built it and when is not known. Actually, almost nothing is known about its history. At least I could not find any relevant information. Some writers give its origin from the Mughal era and some others from the Sikh period. Others claim to be built by the Dogra rulers of Kashmir. This seems to be unlikely, considering its location, well within the borders of Punjab, and the fact that the Dogra rule started in Kashmir comparatively recently in the mid-nineteenth century.
Its small size suggests that it was never meant to be an important stronghold and probably never played in important role in history. It was probably used just to house a small garrison to keep an eye on the adjoining areas and roads passing through this area. However, it was far away even from the old path of the Grand Trunk road between Lahore and Peshawar. Serai Pakka, which definitely marks the old path of this famous road is at least 12 km in the southwest.