Ballylahan Castle is a tower house and National Monument located in County Mayo, Ireland. It was constructed in 1260 by Jordan de Exeter, Sheriff of Connacht and was the ancient seat of the Mac Siúrtáin (MacJordans). The castle came under attack in 1316 by the King of Connacht, Fedlim Ó Conchobair and was almost destroyed.
The main entrance was in the east and it was flanked by two circular towers, of which only one remains. The entrance gives access to an irregular hexagonal bawn. There is evidence of buildings particularly against the western wall. The bawn has some good base-batter, particularly at the northwest corner.
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.