Revelin Fort was built outside the city walls and is partially included into the defence complex of the Ploče Gate. The lower part of the fort was built in 1463, in the shape the City model held by St. Blaise on the triptych painted by Nikola Božidarević around 1500. The fort protected both the eastern part of the City from mainland and the entrance to the City Harbour.
In 1538 the fort was strengthened and enlarged in the form of an irregular square according to the instructions of Italian engineer Antonio Ferramolino of Bergamo. Revelin has three entrances, and was encompassed by the moat and sea on three sides. The well-known Renaissance craftsman Ivan Rabljanin kept the foundries for casting cannons and bells in the large Fort interior.
Today, the spacious fort terraces serve as venues for various performances of the Dubrovnik Summer Festival.
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.