Castle Treis (Treisburg) ruins is situated 70 m high on a promontory and is flowed around by the streams Flaumbach and Dünnbach, both coming down from the Hunsrueck. The exact date of building is unknown. This castle was maybe built in the second half of the 11th century. Today’s appearance is dominated by the mighty restored square-tower. Additionally, there are remains of other buildings of the circular wall maintained.References:
The Odeon of Herodes Atticus is a stone theatre structure located on the southwest slope of the Acropolis of Athens. It was built in 161 AD by the Athenian magnate Herodes Atticus in memory of his wife, Aspasia Annia Regilla. It was originally a steep-sloped theater with a three-story stone front wall and a wooden roof made of expensive cedar of Lebanon timber. It was used as a venue for music concerts with a capacity of 5,000. It lasted intact until it was destroyed and left in ruins by the Heruli in 267 AD.
The audience stands and the orchestra (stage) were restored using Pentelic marble in the 1950s. Since then it has been the main venue of the Athens Festival, which runs from May through October each year, featuring a variety of acclaimed Greek as well as International performances.