The Cathedral of Santa Maria del Fiore is the main church of the Catholic Diocese of Florence. It is the third-largest cathedral in the world and a symbol of the Italian city. In 1982, the cathedral was listed as a World Heritage Site and part of the historical center of Florence. The outside of the church is matched with bright red, dark green, and white marble to form spectacular geometric designs that display the classical, elegant and free interpretation characteristic of the Renaissance era. It is both dramatic and beautiful from any angle.