Huge Oval frame, gilded wood. Any idea what is it?

Hello All,
I purchased a strange object, as I have fallen in love with it at first sight... It's a huge Oval frame, gilded wood. Size is about 180x160 cm. They tell me it comes from an auction in Lyon, France, and that the original object was a mirror, that was replaced because it was damaged during a transportation. The wood looks quite old, as you can see from the picture of a detail of the back.
Thanks for any feedback!

 

The word for a circular work of art is tondo, so this could be a mirror frame as shown (maybe a convex mirror), or it could have framed a tondo work of art.

 

I found it hard to believe that this could have been originally a mirror, given the size. At least I have never seen any mirror like that. I was thinking more as a "tondo" paint coming from a church's apse, but I am no expert... Thanks for your feedback!

 

old window frame from a church or public building ?

 

The mirror now in it is beveled. Doesn't look like a recent replacement.

Debora

 

Never seen a window like this, but I am no expert... Thanks!

 

Why? Here in Italy beveled mirrors are still used. And, the mirror itself does look recent. Thanks!

 

Beveled mirrors are still used here too. But they are a more expensive replacement.

Debora

 

https://www.google.ch/search?q=vecc...mg&ei=SLMVYPigKcWAlwTJ5LDwCQ&bih=535&biw=1184

 

not sure this has any connection. What you serched for, is what is called "rosone di chiesa" in Italian, and usually is round shaped and carved from stone...