The Ginsburg, lying high above the constituent community of Grund was mentioned in 1255 as a Nassau border fortification. The castle achieved historic importance in 1568 when William I of Orange-Nassau drafted plans to free the Netherlands at the castle, also making final preparations for the campaign there. On the Ginsburg Heath was the meeting point for the third army group under Count Ludwig von Nassau, making the Ginsburg, and thereby also Hilchenbach, into a starting point for the Dutch struggle for freedom. Nowadays, only the castle's keep is still fully preserved, the rest of the complex lying in ruins.
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.