The Cathedral of Santa Maria del Fiore is the third-largest church in the world. It has a peculiar plant, as it is composed of a body with three naves welded to a huge roundabout that support the immense Brunelleschi's Dome, the largest masonry dome ever built. Inside you can see the largest surface ever decorated with frescoes by Giorgio Vasari and Federico Zuccari. At the outside in the same artistic style you can be observed the bell tower of Giotto and San Giovanni Baptistery