The two castles of Kleinvernich and Großvernich have guarded the eastern and western banks of the river Erft since 1350. The two-part Grossvernich Castle, known as a 'castrum' with a moat, was built after 1300 near the surrounding wall, which today is hardly discernible.
Kleinvernich Castle is still entirely surrounded by a moat today. However, the estate is used exclusively for agriculture. The only memorial to the late-gothic castle in Grossvernich is the ruin of a tower which is in danger of collapse.
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.