The remains of the former Abbey of Notre-Dame de Clairefontaine are near Clairefontaine, a Belgian hamlet belonging to the city of Arlon. The valley has been inhabited since Roman times and castle Bardenbourg, in which amongst others Countess Ermesinde resided, saw several important personalities of its time. These included Pope Eugene III, who stopped there in 1147 with a group of 18 Cardinals on a trip from Rheims to Trier. The Pope's entourage included Bernard de Fontaine, who became a Saint. It was said that he had been told that someone in the lord of Bardenbourg's family was very ill. Thereupon he got water from a spring not far from the castle, and blessed the sick person with this water. The latter made a miraculous recovery, and this is said to be the origin of the name Clairefontaine. The water is still said to have healing properties.
About a hundred years later, Ermesinde had a vision, apparently seeing the Virgin Mary, and had the Cistercian abbey built here. As the Countess died in February 1247, it was her son Henry V the Blond who constructed the Abbey. It was first mentioned in records in 1250.
The Abbey was destroyed by French revolutionaries. This may be because the inhabitants of surrounding areas used the stones of the Abbey to build their houses.
Around 1875 the Jesuits of Arlon built a new chapel on the place of the old Abbey.
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.