Sign on the wall

It's an inscription in Greek. Honestly, I can't tell you what it says there. My attempts to translate this text with an online translator were unsuccessful. The intuition suggests to me that the part of this word — αρχείο — means archive. And that's it. Maybe my Greek followers will tell me what's written on this beautiful sign on the wall? :)

Agia Triada Tzagaroli Monastery, Crete, Greece.
June, 2013.
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