库宁要塞（克罗埃西亚语：Kninska tvrđava）是位于克罗埃西亚达尔马提亚地区城市克宁的一座城堡，位于该市最高的山上，靠近库尔卡河。这座要塞是欧洲第二大的要塞建筑[1]。现在这里是一个著名的观光景点。
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