The Roman Amphitheatre is the most impressive Roman monument in Sardinia, located in the southern slope of Buoncammino Hill. The structure, built between the 1st and 2nd century AD, was half carved in the rock and half built in local white limestone blocks, with a façade exceeding 20 m. in height. It housed games and fights between gladiators or between men and animals. It was also the seat of public death executions. It could house up to 10,000 spectators, some one third of the town of “Caralis”. It has been used for musical and theatrical representations, which needed the construction of a structure made of wood and scaffolding pipes. After several years in which the Amphitheater was closed, now it is open to visitors.