Yedikule Fortress ('Fortress of the Seven Towers') is a historic fort in Istanbul’s Fatih district, built in 1458 by Sultan Mehmed II by enclosing part of the Walls of Constantinople, including the Golden Gate. Originally an imperial treasury, it later became a state prison, housing notable captives like Sultan Osman II and foreign diplomats.
The fortress, located on the Sea of Marmara, featured storage for valuables, a mosque, and garrison quarters. Used as a prison until 1837, it later served as a gunpowder magazine before becoming a museum in 1895. Today, it hosts cultural events and an open-air theater.
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.