Ehrenberg Castle dates from the early 12th century when it was built by the Counts of Lauffen. The oldest part of the wall around the main castle. The building of the main castle date from the 12th and 13th centuries. To existing keep dates from 1235. The castle was ruined in the Thirty Years' War. The new residential and farm buildings have been built in the 17th and 18th century. Today Ehrenberg is privately owned and can not be visited.
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.