Monasterio de San Juan was founded in 1091, when the kings Alfonso VI and Constance of Burgundy donated a small land to monk Lesmes, who came from the Chaise-Dieu abbey. In 1537 a fire destroyed practically the whole monastery. The reconstruction lasted until the confiscation. During the first half of the 19th century, several confiscations destroyed the heritage of the monastery and the hospital of San Juan. The monks were expelled from the monastery. The buildings were used as a prison.
The Odeon of Herodes Atticus is a stone theatre structure located on the southwest slope of the Acropolis of Athens. It was built in 161 AD by the Athenian magnate Herodes Atticus in memory of his wife, Aspasia Annia Regilla. It was originally a steep-sloped theater with a three-story stone front wall and a wooden roof made of expensive cedar of Lebanon timber. It was used as a venue for music concerts with a capacity of 5,000. It lasted intact until it was destroyed and left in ruins by the Heruli in 267 AD.
The audience stands and the orchestra (stage) were restored using Pentelic marble in the 1950s. Since then it has been the main venue of the Athens Festival, which runs from May through October each year, featuring a variety of acclaimed Greek as well as International performances.