Thank you guys! I really appreciate your comments!
Thank you! It's never too late to try! Since I started buiding with Lego again, about seven years ago, I have wanted to build a gothic chuch like this one! And I finally did it when the Swebrick contest came up. I choose to build a church mainly because "I had so many grey bricks". (an assumption that proved wrong, I ended up buying grey pieces for like $500)
The church is actually quite sturdy! The buttresses are, just like real gothic architecture, thick, which makes the walls very sturdy. Some of interior structure could have been less fragile though :P I haven't weighed it, but I would quess that it weighs around 15 kg.