An 18,000-year-old phalanx was uncovered at this region’s archaeological site of Corbeddu cave. This region’s Arzachena and Ozieri cultures preceded a civilization that built megalithic graves called “giant's tombs.” Structures called Domus de Janas were built in this region prior to a civilization that constructed giant stone towers (-5[1])including one (15[1])at Santu Antine. (15[1]-5[1])Circular (15[1])fortresses called (15[1])nuraghe (15[5])were constructed in this region, (15[1])lending its name to this region’s Nuragic civilization that interacted with (15[1])the (*) Phoenicians. A 238 (-5[1])BC invasion of this island (-5[1])targeted the (-5[1])provincial capital (-5[1])of (-5[1])Caralis, (10[1])which would become Cagliari. (10[4])After this (10[1])island was conquered by the Romans, an ancient Roman province grouped this island with nearby Corsica. (10[2])For (-5[1])10 points, name this Italian island, (10[2])the second-largest in the Mediterranean. (10[3])■END■ (10[2]0[1])