From Marion Tauschwitz:
[V]isiting the Old Shil in September [2013] – on the way to the second floor I discovered a tiny sign on the wall: a young Ukrainian explained the meaning to me: it says the orthodox church had blessed this place to prevent it from evil…
Kind regards,
Marion
http://www.marion-tauschwitz.de
A pity that it didn’t help! The paper looks however, as if it was affixed there after the war…