Duomo di Firenze (Santa Maria del Fiore)

Florence's cathedral, finished with Brunelleschi's dome in the 1430s, the largest brick dome ever built. Entry to the cathedral itself is free, with a queue that moves; the dome climb, bell tower, baptistery and museum need a pass from the Opera del Duomo, and the climbs need a booked time slot.

Opening times and prices change. Check the official site before you go.