I was organizing our basement this week and noticed this painting. Or is it a print? My wife brought it home (for the frame) from her great aunt’s estate about 5-10 years ago. Her great aunt and her husband were quite wealthy and lived in or near Schenectady, NY.

The “label” on the back reads:

Galerie Royale De Dresde
Raffaello Santi
La Madone De Saint Sixte
(Detail)

Pictures attached

I am not an art collector and really have no idea how to proceed. Thanks in advance for any advice.