The Column of Constantine is a monumental column commemorating the dedication of Constantinople by Roman emperor Constantine the Great on 11 May 330 AD. Completed c. 328 AD, it is the oldest Constantinian monument to survive in Istanbul. The column stood in the centre of the Forum of Constantine, on the second-highest of the seven hills of Nova Roma, and was midway along the Mese odos, the ancient city's main thoroughfare.
Ottoman repairs in c. 1515 added iron reinforcing hoops to the shaft. The column was consequently given the Turkish name Çemberlitaş (from çemberli 'hooped' and taş 'stone'), which also came to refer to the surrounding area.
Since 1985, the monuments of the historic areas of Istanbul, including the Column, have been listed as a UNESCO World Heritage Site.
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.