The Plaza Nueva of Bilbao is a monumental square of Neoclassical style built in 1821. The square is enclosed by arcaded buildings and accessed by arches known as cuevas (caves).
The main building was the site of the Biscay government, until a new palace was built in 1890. The place is now the site of Euskaltzaindia, the Basque language Royal Academy.
The arches host many traditional taverns and restaurants, some of the most ancient and typical of the city, and some gift and souvenir shops.
Each Sunday, the square provides space for a traditional flea market where ancient books, coins, stamps, birds and flowers are sold. The square is used often for folk demonstrations, festivals and concerts.
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.