The Cathedral of San Giovanni, also known as the Cathedral of Saint John, is located in Florence, Italy. It serves as the main church of the Roman Catholic Archdiocese of Florence and is dedicated to Saint John the Baptist, the city's patron saint. The cathedral is renowned for its stunning Renaissance architecture and features a striking dome designed by Filippo Brunelleschi. Construction of the cathedral began in 1296 and was completed in 1436. Its exterior is adorned with intricate marble facades, while the interior boasts beautiful frescoes and artworks. The cathedral's bell tower, known as the Campanile di Giotto, is another significant landmark, offering panoramic views of the city.