The citadel, built by Yusuf Adil Shah, a mile (2 km) in circuit, is of great strength, well built of the most massive materials, and encompassed by a ditch 100 yards wide, formerly supplied with water, but now nearly filled up with rubbish, so that its original depth cannot be discovered. Within the citadel are the remains of both Hindu temples and old mosques, which prove that Bijapur was an important town. The fort, which was completed by Au Adil Shah in 1566, is surrounded by a wall 6 m. in circumference. This wall is from 30 to 50 ft (10 to 15 m) high, and is strengthened with 96 massive bastions of various designs. In addition there are ten others at the various gateways. The width is about 25 ft (8 m); from bastion to bastion runs a battlemented curtained wall about 10 ft (3 m) high. The whole is surrounded by a deep moat 30 to 40 ft (10 to 12 m) broad. Inside these walls the Bijapur kings bade deference to all comers. Outside the walls are the remains of a vast city, now for the most part in ruins, but the innumerable tombs, mosques, caravanserais and other edifices, which have resisted the havoc of time, afford abundant evidence of the ancient splendour of the place.