The Castle of Mercato San Severino is the second-largest castle in Italy and was founded after 1067 by a Norman knight named Turgisio Sanseverino. The appearance of the castle today has been particularly influenced by the Angevin period. The settlement is marked by three walls: a first nucleus that includes the palatium and the so-called piazza d'armi (army square), and other rooms. The walls of the first enclosure continue south, surrounding a Franciscan convent, the village, and the corresponding church.
The second enclosure with its semicircular towers extends eastward, and it is connected to the last enclosure from the Angevin-Aragonese era, with a triangular perimeter that has a round tower at its vertex. The original size of the site was approximately 350 by 450 meters, with a total area of 157,500 square meters, equivalent to three football fields.
The third enclosure, at a lower elevation, extends eastward with a layout called 'a sperone,' and at its highest point, there is a round tower with three typical Angevin-era gun ports.
The castle was initially owned by the Sanseverino family but was eventually abandoned due to the involvement of one of its members in the Barons' Conspiracy against Ferrante. As a result, Ferrante confiscated the castle from its owners and only returned it after several years, by which time it had lost most of its military characteristics. The castle still partially preserves the chapel and the church. Saint Thomas himself visited this castle to visit his sister, Teodora, who was married to a Sanseverino. The future saint stayed at the Dominican convent. Coins, ceramics, arrowheads, and many other artifacts have been found inside the castle.
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.