"... actually, less than 2 hours. I spent another 20 minutes reading the details in the very helpful guide. As as teacher of Social Sciences, I use these things in class. I had great fun putting it together. The diverse architectural styles kept me entertained. The finished product is a sleek, professional looking piece which I can proudly display. I think that the city skyscape series is beautiful. I can't wait to build Venice, and I hope that you (Lego Architecture creators) produce Moscow, Dubai and Barcelona soon! Just a wish.... The only thing is ... this really is not for young children, unless they have a particular fascination with architecture. Well done! I look forward to moving on to Venice."