Which is the largest church in the Italian Republic?

The Milan Cathedral,Duomo di Milano, or Metropolitan Cathedral-Basilica of the Nativity of Saint Mary is the cathedral church of Milan, Lombardy, Italy.

The cathedral took nearly six centuries to complete: construction began in 1386, and the final details were completed in 1965. It is the largest church in the Italian Republic—the larger St. Peter's Basilica is in the State of Vatican City, a sovereign state,

Milan cathedral is a wonderful examples of Gothic architecture and it is unique in Italy as strongly influenced by the aesthetic of Norther European Churches such as those in France and Germany.

Milan’s cathedral is said one of the biggest Christian churches in the world and the biggest gothic cathedrals ever made. It has 40 pillars and 5 naves and it can contain over 40,000 people. The duomo has 55 stunning stained glass windows with elaborate depictions of religious parables and episodes from the Bible.

Its façade is indeed exceptionally intricate with statues of human and divine figures as well as gargoyles. They say there are over 4000 statues on it and 135 spires, an elaborate appearance that it typical of the gothic style.