The monastery Moni Fotodotis (Photodotis). After fortification in the 15th century was the entrance to the monastery on the outer staircase. Now the monastery is empty, but repaired. Naxos.
<a href="//commons.wikimedia.org/wiki/User:Zde" title="User:Zde">Zde</a>
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<span class="int-own-work" lang="en">Own work</span>