The Cathedral of Santa Maria del Fiore, commonly known as the Duomo of Florence, is one of the most iconic landmarks in Italy. Completed in the 15th century, it is renowned for its massive red-tiled dome designed by Filippo Brunelleschi, which revolutionized Renaissance architecture. The cathedral’s white and green marble façade, intricate stained glass, and stunning interior make it a masterpiece of Gothic and Renaissance art and engineering.