The Château of Val-Duchesse is a former priory owned by the Belgian Royal Trust. The priory for women was founded in 1262 by Adelaide of Burgundy, Duchess of Brabant, widow of Henry III, Duke of Brabant. 'Duchess Adelaide' gave her name to the place Val Duchesse or Hertoginnedal. It was the first priory for women in the Low Countries that followed the rule of Saint Dominic and was generously donated by Aleydis and other noble ladies. According to her wish Aleydis' heart was interred at a mausoleum today disappeared.
The priory further flourished and gained considerable wealth thanks to the generous gifts of numerous royal persons and noble families. In 1650 a wall was erected to protect the diverse edifices of the priory. The present-day château was built as a residence for the prioress in 1780.
Château of Val-Duchesse played an important role as a venue for negotiations in Belgian and European politics after World War II. In 1956, Paul Henri Spaak lead the Intergovernmental Conference on the Common Market and Euratom at the château, which prepared the Treaties of Rome in 1957 and the foundation of the European Economic Community and Euratom in 1958. The first formal meeting of the Hallstein Commission, the first European Commission, under the presidency of Walter Hallstein, was held on 16 January 1958 at the château.
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.