The medieval Kienburg castle was located between Huben and St. Johann im Walde, in the municipality of Matrei. Its name derives from the old German term for 'kühn', that's to say bold, or from Archbishop Erich Kuenburg, one of its owners. It is a hill castle, located in the forest above the Iseltal valley and mentioned for the first time around 1000 AD.
The castle had a key position in the trade of the Iseltal, Defereggental and Kalsertal valleys. Once, the mighty Earls of Lechsgemünde inhabited the castle, in the following centuries, it was witness and centre of fight and devastation. Among the owners there were the Bishopric of Salzburg and Knight Earl Christoph von Kienburg, its last inhabitant when it was destroyed by a fire in 1579. In 1945, an American aerial bomb destroyed most of the still existing walls.
Currently, the Kienburg Castle Ruin is being renovated: It is in private hands, the surrounding is a restricted archaeological area.
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.