The Château du Girsberg is one of three castles (with the Château de Saint-Ulrich and the Haut-Ribeaupierre) which overlook the municipality of Ribeauvillé.
The Lords of Ribeaupierre built the castle, then named Stein (La Roche), in the 13th century. They rebuilt it after a fire caused by lightning in 1288. In 1304, they gave it to their vassals, the knights of Guirsberg, from whom the castle took its name. The Guirsbergs kept it until they died out in the 15th century. It was abandoned in the 17th century.
The remains currently visible contains 13th century pentagonal keep, inner court and corps de logis from the 14th-15th centuries.
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.