Kost Castle is is privately owned by Kinský dal Borgo noble family. It was first proposed by Beneš von Wartenberg in 1349 as a possible construction site and was completed by his son Peter von Wartenberg. It retains most of the original features and is overall very well preserved and maintained.
The castle is known for its so-called 'White tower'. In about 1414 the family of Zajíc von Hasenburg moved there; later the family of Schellenberg (1497 - 1524), Lobkowicz (till 1576) and others; in this time some more buildings were built near the castle and joined to it.
Unlike most other castles in Bohemia, it does not lie on a hill, but on a spit between two brooks. Another peculiarity is the tower, which has a trapezoid-like ground-plan. The trapezoidal tower has the corners facing the areas of most likely catapult attacks. This is to make the missiles glance off the tower walls instead of hitting it headon thereby minimizing the damage.
The castle is open to the public and hosts events and exhibitions.
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.