When I was in Moscow the Cathedral was closed because we went there too late already and it was such a pity as I really wanted to see that. To me this is one of the most beautiful buildings in the world. It's so colorful and its shapes are just so nice. You did a great job with the sketch. From those 4 I like your the most :)
It's nice that you didn't only attend the competition but you also had nice dinner with your friends.
I wish I could go to Moscow once again..
Have a lovely week!