The Roman Amphitheatre of Cagliari is an ancient Roman amphitheatre, located in the city of Cagliari, southern Sardinia, Italy.
The structure, built in the 2nd century AD, was half carved in the rock, while the rest was built in local white limestone, with a façade surpassing 20 m in height. It housed fights between men and animals, of gladiators and other specialized fighters recruited in and outside Sardinia. It was also the seat of public executions. It could house up to 8,000 spectators, some one fourth of the Roman Caralis.
"Roman amphitheatre render"
The amphitheatre was no longer in use starting from the 5th century AD probably after Christian became the most popular religion in the empire and was subsequently used as a free stone quarry by the rulers of the area, from the Byzantines, the Republic of Pisa, the House of Aragon and others.