The European Archaeological Park at Bliesbruck-Reinheim, in the German municipality of Gersheim and the French municipality of Bliesbruck, is a cross-border project which combines excavations and reconstructions of Celtic and Roman finds with exhibition and educational facilities. It was created in 1989 as a result of the archaeological work being done on both sides of the Franco-German border. Together with archaeological evidence from the Mesolithic Period, the Bronze Age, and the period of the Germanic migrations, the Celtic and Roman finds from the Iron Age bear witness to a history of continuous settlement in the Blies Valley that spans a period of 10,000 years.
Probably the most interesting excavation on the area is the Tomb of the Celtic Princess of Reinheim, dating from the 4th century BC. It is a woman's grave that was filled with exceptionally rich funerary objects. The burial chamber, constructed of oaken beams, was covered over by a massive mound of earth.
There is also a Roman villa in Reinheim. This very large complex includes courtyard walls enclosing an area 300 metres long and 135 metres wide with a main building to the north that measures almost 80 by 62 metres. One portion of the building in the north end of the west wing is thought to have been the villa's private thermal baths, due to the layout of its rooms and the discovery of water channels and fragments of cylindrical tiles (tubuli) attesting to the existence of under-floor heating (hypocaust).
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.