Wildenburg is a ruined castle near Kempfeld in the county of Birkenfeld. The ruins lie in the Hunsrück mountains between the Idar Forest to the north and the town of Idar-Oberstein.
The predecessor of the Wildenburg was probably a Celtic refuge fort with double ramparts from the La Tène period (ca. 450-50 B.C.). The Wildenburg rampart is one of a number of Celtic fortifications in southern Hunsrück between the hillfort of Otzenhausen, the Ringkopf, the Altburg and the Alteburg in Soonwaldsteig. A short section of the rampart has been reconstructed as a 'Gallic Wall' (murus gallicus).
Around the year 350 AD a late Roman fort was established on the Wildenburg for a short time.
In the Late Middle Ages Wildenburg was built by the Wildgrafen family on the rocks at the western tip of the circular rampart. It was first mentioned in 1330 and was pillaged and destroyed by marauding troops from Lorraine in 1651. After being partially rebuilt in 1660, the lower ward of the castle acted as the administrative headquarters for the Amt of Wildenburg until the abolition of the county in the 1792.
Of the upper bailey (Oberburg) that was built on rocks only a few wall remains have survived. However, in 1980, a 22-metre-high observation tower was built on the top of the rocks that was opened in 1981.
In 1859 the buildings of lower bailey (Unterburg), including the gate tower, domestic buildings and enceinte, were restored for the Prussian Forestry Commission. These buildings were further converted into the present-day castle cafe and headquarters of the Hunsrück Club.
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.