The correct answer to this open question is the following.
The Duomo is the Basilica of Santa Maria del Fiore, the cathedral of Florence, Italy. It is called the Duomo because it has a huge dome on the east side of the cathedral. The architect of this majestic building was Filippo Brunelleschi and started the construction in 1296 but due to the difficulties, it was ended until 1436. The Basilica is a symbol of the Renaissance years.
