An inscription in Greek

Not so long ago I was walking between these ruins lying outside an old stadium on the Greek island of Rhodes (Rhodos, Rodos). There were inscriptions on several of them, and once again I found my lack of knowledge of the Greek language a shame. As a tourist on an "tourist-infected" island like this, we get by due to among other things the double signposting and the courtesy of the Greek people. But I can't read a single thing. I felt like an illiterate. I know that these were probably old inscriptions, but the principle is the same.

What, for instance, might this mean?