The Aragonese Castello di Brucoli was built in the 15th century as a watch tower to guard the coast and monitor and protect against Turkish-Barbarian raids. It underwent several additions and alterations in the following centuries, e.g walls with circular towers at the corners were added in the 16th century.
The Castle of Brucoli dominates much of the Gulf of Catania and was therefore used as a watch and guard post in the 18th century, hosting a military garrison in the employ of the nearby fortress of Augusta. It guarded also the port of Brucoli.
Despite the effects of time, the castle is in good condition.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.