城塞（英語：Citadel）是都市或城鎮的防禦加固區塊，可能會是一座要塞、城堡或防禦中心。[1][2]
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Citadel一詞來源於拉丁文「Civis」，意為公民。另有說法「城塞」一詞來源於近代早期意大利文「Cittadella」，意為「小城市」。
參考文獻
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