Sanjay G.
Yelp
The Baptistery of San Giovanni, one of the most ancient churches in Florence, sits opposite the city's cathedral, the church of Santa Maria del Fiore. I got to know, places like this, they always have 3 buildings. Duomo, Baptistery and some kind of tower (Example- Pisa, where they have the leaning tower of Pisa, Piazza del Duomo & Baptistery).
As you enter the building, your attention is immediately drawn by the precious mosaics in the dome the mosaics are dominated by the huge figure of Christ in Judgement, with scenes from the Last Judgement occupying three of the dome's eight segments. The horizontal registers superimposed in layers tell the stories of St. John the Baptist, the patron saint of Florence, of Jesus, of Joseph and of the Creation of the World. The Angelic Hosts occupy the highest register of all, in the center of the dome.
The other main sight in the cathedral complex is the bronze doors on the Baptistery call the "Gates of Paradise". While undoubtedly impressive, these are actually replicas, the actual doors having been moved inside the Duomo Museum for conservation purposes. Michelangelo called the name actually Gates of Paradise, is fully Renaissance masterpiece of Ghiberti and his assistants