1The Duomo is the fifth largest Christian church in the world

Outdone by St. Peter’s Basilica in Rome, the Basilica of Our Lady of Aparecida in Brazil, Cathedral of St. John the Divine in New York and Seville’s Cathedral, Milan Cathedral is still one big church!

Covering a surface of 109,641 square feet and an entire city block, its size is even more impressive considering it’s the oldest church on that list.