Valangin castle was a residence of the local lords from mid-12th century to 1566. The oldest visible remains date from the 13th century. It consists of a courtyard surrounded by a rampart and a 'donjon' (keep), which hosts the current museum.
Since 1430 the castle was altered with semicircular towers to be defended against the firearms. The castle was damaged by fire in 1747 which destroyed a whole wing. The dungeon was restored and partly rebuilt between 1769 and 1772. Today Valangin castle is a museum.
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.