The feudal castle of Sancerre was one of the strongest castles of the Middle Ages built in France. It was the seat of Counts of Sancerre. The future king Charles VII and Joan of Arc stayed at the Chateau de Sancerre, which was strategically placed on the border of the "kingdom of Bourges."
The town of Sancerre was formerly fortified. It was built under the castle, closing access to the less steep slope of the mountain. The castle and city walls were demolished in 1621.
Today only the tower, foundations, cellars or parts of walls remains of castle. The location of the old castle is now occupied by a mansion (1874) of Louis XII and a private park, owned by the Company Marnier-Lapostolle.
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.