The manors of Kirburg and Wissen originally belonged to the noble lords of Freusburg, who presumably also built Schönstein Castle. Through the marriage of their heiress, Aleidis von Molsberg, to Eberhard von Arenberg, the properties came into the possession of the Lords of Arenberg, Burggraves of Kurköln, in 1176. Eberhard and Aleidis' sons divided the property along the Sieg River. Heinrich received the land south of the river, including Schönstein, and continued to be known as 'von Arenberg,' while Gerhard received the properties north of the river and became known as 'von Wildenburg.' After the extinction of the Arenberg lineage in the male line in 1280, the Archdiocese of Cologne seized the parish of Wissen to the left of the Sieg River as a lapsed fief. From 1281, Schönstein Castle served as a pledged object for the Archdiocese of Cologne. The Wildenburger Land with Wildenburg fell to Johann von Hatzfeldt († after 1407) through the heiress Jutta von Wildenburg.
In 1589, Hermann von Hatzfeld-Werther received Schönstein Castle as a recognition of his services from Kurköln. By then, the castle had suffered significant damage, and in 1594, Hermann von Hatzfeldt-Werther estimated the maintenance costs at 16,000 gulden. During the Thirty Years' War, the castle was occupied, looted, and set on fire by Swedish troops, but it was rebuilt on the initiative of Wilhelm von Hatzfeld. Since 1912, Schönstein Castle has served as the administrative seat of the Hatzfeldt-Wildenburg Chamber.
Today, it is also the residence of the von Dönhoff family.
The main building, which has an approximately triangular floor plan, is a typical courtyard castle, with the buildings arranged around an inner courtyard. It has been built or restored from the Middle Ages to the present day, making the architectural history quite intricate. The brick facades from the late 16th century stand out from the older north wing with its rubble masonry. The baroque staircase in the south wing was built in the first half of the 18th century. Of interest is the two-story wooden gallery on the east wing. The first floor was built in 1598, and the second floor in 1623.
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.