The Theatre of Dionysus Eleuthereus is a major theatre in Athens, built at the foot of the Athenian Acropolis. Dedicated to Dionysus, the god of plays and wine, the theatre could seat as many as 17,000 people with excellent acoustics, making it an ideal location for ancient Athens' biggest theatrical celebration, the Dionysia. It was the first theatre ever built, cut into the southern cliff face of the Acropolis, and supposedly birthplace of Greek tragedy. The remains of a restored and redesigned Roman version can still be seen at the site today. It is sometimes confused with the later, smaller, and better-preserved Odeon of Herodes Atticus, located nearby on the southwest slope of the Acropolis.
The site has been used as a theatre since the sixth century BC. The existing structure dates back to the fourth century BC but had many other later remodellings. The only certain evidence of this early theatre consists of a few stone blocks that were reused in the 100 century BC.
By the end of the fifth century BC, some of the wooden constructions had been replaced with stone. The Theatre of Dionysus in its present general state dates largely to the period of the Athenian statesman Lycurgus (ca. 390-325/4 BC), who, as overseer of the city's finances and building program, refurbished the theatre in stone in monumental form. The fourth century theatre had a permanent stage extending in front of the orchestra and a three-tiered seating area (theatron) that stretched up the slope.
The Theatre of Dionysus underwent a modernization in the Roman period, although the Greek theatre retained much of its integrity and general form. An entirely new stage was built in the first century CE, dedicated to Dionysus and the Roman emperor Nero. By this time, the floor of the orchestra had been paved with marble slabs, and new seats of honor were constructed around the edge of the orchestra. Late alterations carried out in the third century AD by the archon Phaedrus included the re-use of earlier Hadrianic reliefs, which were built into the front of the stage building.[The remains of a restored and redesigned Roman version of the theatre can still be seen at the site today.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.