Plauen Castle was built around 1250 as the seat of the bailiffs of Plauen. From 1466 it served as the Electoral Saxon official seat, burned down in 1548, was rebuilt around 1670 as a secondary residence of Saxony-Zeitz , served again after 1718 as the Electoral Saxon official and court seat and from 1852 as a prison.
In April 1945, the large area was significantly destroyed by air raids, along with large parts of the old town. Cell tracts that were preserved continued to serve as a penal institution after the war and were only demolished in 2013. An archaeological excavation followed. In the future, the campus of the Plauen State Study Academy will be housed in new buildings on the premises , with the ruinous historical building fabric being preserved and partially rebuilt.
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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.