LARGE ANTIQUE 1891 FRAMED ST. CECILIA PRINT

I've had this piece for over 20 years, it was obtained from an estate sale at a retirement home. It was in this condition when I acquired it; but something about it pulled me in and I had to bring her home.  She was covered in such a heavy layer of dust the picture couldn't be seen.  

The print measures 19 x 15 1/2 and the frame is 34 inches by 29 inches. I've not made any alterations to the piece at all for fear of further harming it.

My apologies for the quality (or lack thereof) of the pictures.  I've tried to show the flaws so as not to misrepresent the condition.

Would anyone have any idea of what this is worth, aside from the sentimental value she holds?

Poor