Rising above the heart of the city, the richly-decorated Duomo-Santa Maria del Fiore-and its orange-tiled dome have become Florence's most famous symblos. Typical of the Florentine determination to lead in all things, the cathedral is Europe's fourth largest church, and to this day it still remains the city's tallest building.The Baptisty, with its celebrated bronze doors, may date back to the 4th century, making it one of Florence's olderst buildings. The Campanile, designed by Giotto in 1334, was completed in 1359, 22 years after his death.