I am very happy to inform you that as from today, all sites and museums will not close at 3pm.
More specifically sites and sites' museums will close at sunset.
For the closing times of the rest of the museums, check individual websites or -even better- ask us and we'll give them a call.
At that point I will kindly ask you if you use this post as a source of information. Meaning, please don't post any comments for how much public servants work (or don't work) in Greece, since the aspects of this situation were plenty and complicated.