linguistic:paraphrasing, structural:summarization, information:classification, stylistic:tone, information:filtering
City wall and gates

The ruins of Nineveh are surrounded by the remains of a massive stone and mudbrick wall dating from about 700 BC. About 12 km in length, the wall system consisted of an ashlar stone retaining wall about 6 metres (20 ft) high surmounted by a mudbrick wall about 10 metres (33 ft) high and 15 metres (49 ft) thick. The stone retaining wall had projecting stone towers spaced about every 18 metres (59 ft). The stone wall and towers were topped by three-step merlons.

Five of the gateways have been explored to some extent by archaeologists: