Thanks all! Though, it was all a matter of chance. Was talking to a group of friends when I saw her lean out of the window. I thought she would have finished her task and reclosed the shutters before I could pull my camera out of my bag.
Yes, there is just a faint trace of where it has been filled in and painted over. While not as obvious here, this modification of buildings throughout centuries of use and reuse can be seen in buildings throughout Italy.