Castle of Santiago was built in the second half of the 15th century by the 2nd Duke of Medina Sidonia. It was not designed for military or surveillance purposes. Therefore, it can be considered as a demonstration of power of the Duchy. Throughout its history, it has functioned as a ducal fortress and barracks. After almost a century of neglect and suffering serious damage from a fire, it was completely remodelled.References:
Built around AD 90 to entertain the legionaries stationed at the fort of Caerleon (Isca), the impressive amphitheatre was the Roman equivalent of today’s multiplex cinema. Wooden benches provided seating for up to 6,000 spectators, who would gather to watch bloodthirsty displays featuring gladiatorial combat and exotic wild animals.
Long after the Romans left, the amphitheatre took on a new life in Arthurian legend. Geoffrey of Monmouth, the somewhat imaginative 12th-century scholar, wrote in his History of the Kings of Britain that Arthur was crowned in Caerleon and that the ruined amphitheatre was actually the remains of King Arthur’s Round Table.
Today it is the most complete Roman amphitheatre in Britain.