From a website dedicated to the Bronze Age civilization of Minoan Crete:
It appears that the Greek government claims copyright over all the archaeological sites in Greece. As a result, anyone wanting to take photos or video of archaeological sites has to get permission to take photos or video. Anyone wishing to display these photos or video on the Internet has to get permission to do that too.
This website was launched in 1998, certainly before the law on the Internet was in force. At that time I informed the archaeologists in Heraklion about my website so that any potential problems could be sorted out at the beginning. The archaeologists told me they would check my website and I heard nothing further. For the following fifteen years I continued expanding my website on the assumption that all was well until last week when I was informed by an archaeologist that I had to obtain permits from the Ministry of Culture.
I have submitted my application for permits but I do not know how long it will take to get a decision. In the meantime I have, with a heavy heart, removed the photos from my website.