Nativity Facade of the Sagrada Família. It's one of the greatest buildings of modern times. It's the greatest cathedral {Ed.'s note: yes, we know it's technically a basilica} built in the last several hundred years. Frankly, it's one of the greatest cathedrals ever built. Even if it's not to your taste — it's fantastically unique and idiosyncratic, to be sure — the sheer audacity, complexity, scale, and craftsmanship demand awe and appreciation. It won't be completed until 2026, at the…