The Metropolitan Cathedral of Santa Maria del Fiore , commonly known as the Duomo of Florence , is the main Florentine church, symbol of the city and one of the most famous in Italy; when it was completed, in the fifteenth century , it was the largest church in the world, while today it is considered the third in Europe after St. Peter’s in Rome and the Milan Cathedral. It stands on the foundations of the ancient cathedral of Florence, the church of Santa Reparata, in a point of the city that has hosted religious buildings since Roman times.