This three-metre-high stained glass window was found in 2019 during the restoration of the altarpiece that covered it for five centuries. Its discovery has led to discovering the oldest figurative stained glass window in Catalonia, since the upper and lower panels date from the early thirteenth century; the central panels, representing Sant Martí and Sant Francesc, date from the fourteenth century and are of outstanding quality in the European context of that time. In the room where it is exhibited you can see the piece from a great distance (as the stained glass windows are usually seen in their original places) and at the same time approach to see the rich details it presents, a privilege that can rarely be had with these pieces.