An oval structure built in the 2nd century overlooking the sea, its stands were carved directly out of the underlying bedrock. The amphitheatre is 109.5 metres long by 86.5 metres wide and can hold up to 14,000 spectators. In its day, it was the scene of fights between gladiators and against wild beasts, as well as public executions. In the year 259 A.D., the Bishop Fructuoso and his deacons Augurio and Eulogio were burned alive within its confines. In the early 6th century, a Visigoth basilica was built on the site, which was eventually replaced by the medieval Santa Maria del Miracle (Our Lady of the Miracle) church.