The Duomo

The Duomo in Milan is a staggeringly large church, even by European standards.  All of the midevil church accoutrements inside have proportionately expanded as well--there's just an overwhelming number of intricate sculptures, stained glass windows, and renaissance art, all embedded in massive Roman columns and stonemasonry that leaves you gawking.   Below is the front door, adorned with impossibly intricate metal work, and guarded by the Italian military with fantastically awesome hats.