The first record of Kirumpää Castle (in German Kirrumpäh) dates back to the year 1322. It was one of the residences of Bishopric of Dorpat. The castle was destroyed in a Swedish-Russian war in 1658. Much of the ruins were used for construction in Võru town in XVIII-XIX century. Today, there is little left of the former castle. The ruins are located on a small scenic hill.
Reference: Wikimedia Commons
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.