拉冈尼基协定（Racconigi Agreement/Bargain）是在第一次世界大战爆发之前，1909年10月沙皇尼古拉二世和意大利国王维托里奥·埃曼努埃莱三世在意大利皮埃蒙特附近的拉冈尼基达成的秘密协定。
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