Château de Freundstein is a ruined castle in the commune of Goldbach-Altenbach. The castle was recorded in 1297. It ownership was shared between the abbey at Murbach and the bishops of Strasbourg. It waas given as a fiefdom to the Waldner family who still own it. In 1441, it was attacked by the Mulhouse and in 1525 by rebellious peasants. It was restored in the 16th century, but abandoned shortly afterwards. The ruins were used as a military observatory during the First World War. The ruins consist of sections of wall from the high castle, with loopholes and more recent openings.
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.