The Roman baths of Durrës, dating back to the first century AD, were discovered in the 1960s, during the excavations that also revealed more of the amphitheatre. The ruins are situated just off the big square at the back of the Alexsander Moisiu Theatre, and entrance is free. The pool, 7 metres long by 5 metres wide, was heated by a hypocaust, a form of early central heating used in Roman baths across the empire. Naturally, the furnace that heated the pool was expensive and labour-intensive to run, and so the presence of the baths in Durrës indicates that it was a settlement of some considerable wealth.
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.