Thank you guys! I'm sorry I didn't see your replies earlier.
For the composition of that picture, yeah, it was a difficult one because I was sitting in that fancy restaurant with my girlfriend and couldn't very easily more around and also I was very close to that dome, so I had to use a wide angle. The round thing is a platform for musicians. I think it would have look better if I had a higher point of view, but the only higher points of view were closer to the dome. I'm still pretty satisfied with that picture, and will definitely take more pictures. Ah, and I didn't use a tripod in the restaurant, lol! It was a handheld shot, with the table to support my hands.