On my trip to Greece in 2014, I visited the Theatre of Dionysus in Athens and the Theatre of Delphi on tours of the Athenian Acropolis and the Sanctuary of Apollo in Delphi, respectively. The Theatre of Dionysus is quite small and not that impressive, but better preserved than the nearby larger Odeon. I only really viewed it from above, and it wasn't a very memorable sight. The theatre at Delphi seems larger and better preserved than the one in Athens. I also had a better view of it from the bottom.

As a whole, the Ancient Greek Theatres do have OUV, and they are definitely symbols of innovations in art, not to mention demonstrations of innovations in acoustics and architecture, but does that make them better grouped together? Theatres are essential parts of ancient Greek cities, and as stated in the justifications of OUV, are completely connected to other parts of the cities. That's the problem with this serial T-list site: the individual theatres are more coherent sites with their respective cities than with what seems to be a somewhat random selection of theatres around Greece. They were built at different times, under different conditions, tell different stories of different cities, and lie in various states of preservation. A serial site this big can't have every site considered revolutionary. We also shouldn't forget that other essential parts of an ancient Greek city exist, and theatres shouldn't be the only structures highlighted in every single ruin now. Theatres are meant to be enjoyed along with everything else in a city, and that's the way it should be on the list.