St. Marienthal Abbey (Kloster St. Marienthal) is the oldest nunnery of the Cistercian Order in Germany to have maintained unbroken occupation of its house since its foundation. St. Marienthal is located to the south of Ostritz on the left bank of the Neisse, which at this point forms the German border with Poland.
The abbey was founded in 1234 by Kunigunde of Hohenstaufen, daughter of Philip of Swabia and wife of Wenceslas I of Bohemia, near a trade route that ran from Prague to Görlitz via Zittau. As early as 1235 the new foundation was incorporated into the Cistercian Order, with the abbot of Altzella acting as visitor. The first documented abbess of St. Marienthal Abbey was the noblewoman Adelheid I. von Dohna, daughter of Burgrave Otto von Dohna.
The abbey was destroyed during the Hussite Wars in 1427, and not rebuilt until 1452. It was damaged by fire in 1515, 1542 and (particularly seriously) in 1683. Rebuilding in the Baroque style began in 1685. The Baroque church interior suffered extensive damage in a flood of the Neisse in 1897.
During World War II the buildings were used as a military hospital. In 1945 the retreating German forces wanted to blow up the abbey to hinder the advance of the Russians, but the nuns refused to leave, and the building was spared.
The abbey survived the Communist East German régime and after 1989 spent large sums on restoration and developing the facilities. In August 2010 however another flood of the Neisse caused catastrophic damage.
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.