Complex sentence: The old citadel of Bampur which crowned an elevation about 100 ft. in height, 3 miles north of the river, having completely fallen in ruins, a new fort called Kalah Nasseri, was built at Fahraj, 15 miles further east, in the 1880s.
Split into simpler sentences: The old citadel of Bampur, on a hill about 100 ft. high 3 miles north of the river, fell into ruins. A new fort called Kalah Nasseri, was built at Fahraj, 15 miles further east, in the 1880s.