公元1500年当比萨人（Pisans）被包围并且危在旦夕的时候，他们用泥土修建了一种防御墙，并且发现泥土可以像流沙一样把炮弹的威力吞噬掉。
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The mysterious Nuraghic people came around 1800 BC, followed by the Phoenicians and Carthaginians, Romans, Germanic Vandals, Byzantines, Pisans, Genoese and Spanish, before the island was incorporated into a unified Italy in 1861.
BBC: Sardinia, land and sea
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