Introduction to the Cathedral Opera Museum: The Cathedral Opera Museum is located behind the main church. After renovation, it became a museum that collects and displays the original cultural relics of the Cathedral of Santa Maria del Fiore. It is considered one of the most important sculpture museums in the world. It has a collection of The original "Gates of Paradise" of the Baptistery created by Ghiberti, in addition to precious works of art such as "St. John" created by Donatello and Michelangelo's "Pietata".