The castle of Peñaranda de Duero is a well preserved Gothic castle. The castle originally dates from the 10th century but reforms by Counts of Miranda del Castañar in the 15th century changed much of the building. Today the castle stands at the start of a defensive wall that formerly surrounded the town, of which only the crenellated arch of 'Las Monjas' still stands.
The castle was an important point on the fortified line which existed between the medieval Christian Kingdom of Castile and the Moor state of Al Andalus during the 10th century. The castle is a narrow walled precinct, with a four story keep rising from the center. The keep features a rooftop terrace, battlements, a gallery of machiolations, and three additional square towers, two of which flank the ogival arch that marks the entrance. The walls are solid stone ashlar stone, although much of the keep features decorative wooden beams.
Today, the Castle of Peñaranda de Duero serves as one of the many historical monuments and tourist attractions in the area.
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.