Athens, circa 1887.
Royal family photograph.
Shot taken by the photographer Petros Moraitis, born in Tinos island. He gained access in the royal family through his marriage with the daughter of the German baroness Perl.

It seems that it's been signed by some of the members of the royal family.
We can read, from left to right, the names: Nikolaos (Νικόλαος), Maria (Μαρία), Olga (Όλγα), Konstantinos (Κωνσταντίνος), Alexandra (Αλεξάνδρα), George (Γεώργιος)