Just in front of Vlaherna Monastery there is an island called Pontikonissi on which there is only one building: the church of Pantocrator. According to one interpretation of the Odyssey this island would be the ship of Ulysses that was turned into rock by Poseidon while, according to another legend would be the rock on which Ulysses' ship crashed during a storm.
The church of Pantocrator was built in the 13th century and to visit it you can take a boat from the small port opposite. The Byzantine chapel that is on the top of the island encloses the memorial tablets of Elizabeth Empress of Austria and Rodolfo archduke.
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.