The Romans, Byzantines, and medieval Europeans built defensive towers as part of the fortifications of their city walls (e. g. , the Tower of London).
罗马人、拜占庭人和中世纪欧洲将用作防御的塔建成为城墙上防御工事的一部分（比如伦敦塔）。
The Romans, Byzantines, and medieval Europeans built defensive towers as part of the fortifications of their city walls (e. g. , the Tower of London).
罗马人、拜占庭人和中世纪欧洲将用作防御的塔建成为城墙上防御工事的一部分（比如伦敦塔）。
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