Thank you Antonella, you are right about the fact that the image should be straightened, I noticed that, but couldn't find a solution for that. There's a distorsion due to the shooting angle and perspective, the podium in the front is parallel with the bottom margin, while the back altar seems to be displaced to the left. As I was not shooting perpendicularly to the background, this is the effect I don't know how to correct.
Wonderful picture, Florin, excellent subject. The only thing, IMO, is that it is a little bit tilted and should be straightened out. Many kisses, dear! Antonella