Plasencia City Walls were built in the late 12th century by Alfonso VIII of Castile, who founded Plasencia to protect his western border. The original perimeter was around 2.4 kilometers long. Towers with semicircular floors reinforced the walls and 26 of the original towers are still preserved. To visit the Wall of Plasencia visitors must stroll through the center of the old city and pass through any of the eight existing doors, gates and wickets. A walks through the barbican is an experience to enjoy.
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.