The Castle of Arnóia is a medieval castle in civil parish of Arnóia, municipality of Celorico de Basto, the district of Braga. It was built in the late 11th or early 12th century, probably to defend the local monastery. The abandonment occurred from 1717, when elites left the small village of Basto, moving the seat of the county to the parish of Britelo, where today is located Celorico de Basto.
Today there are four defensive elements survived: the watchtower (whose rooftop and set of battlements were reconstructed in the 20th century), the quadrangular tower, a single door and the tank.
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.