Istein castle was a rock castle built by the bishops of Basel in the 11th and 12th centuries. It was first time mentioned in 1185. The castle was stormed in 1410-1411 by the Basler troops. The modern fortress was built in 1900-1914 and destroyed after 1945.
St. Vitus Chapel, partially ruined, is one of two original castle chapels built in the 12th centurya. The current small chapel, which was built after the destruction of the castle in 1650 and destroyed by the French occupation forces in 1947, was rebuilt in the 1980s due to a citizens' initiative.
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.