The Florence Baptistry or Battistero di San Giovanni (Baptistry of St. John) is a religious building in Florence (Tuscany), Italy, which has the status of a minor basilica.

The octagonal Baptistry stands in both the Piazza del Duomo and the Piazza di San Giovanni, across from the Duomo cathedral and the Giotto bell tower (Campanile di Giotto). It is one of the oldest buildings in the city, built between 1059 and 1128. The architecture is in Florentine Romanesque style. Florentine style has not seen the spread of the Pisan Romanesque or Lombard, however, its influence was decisive for the subsequent development of architecture, as it formed the basis of which drew Francesco Talenti, Leon Battista Alberti, Filippo Brunelleschi and the other architects who created the ' Renaissance architecture . The Church of the Holy Apostles is a clear example, it announced for its spaciousness, as noticed by Giorgio Vasari, Renaissance themes. Therefore, in the case of the Florentine Romanesque, one can speak of "proto-renaissance", but at the same time an extreme survival of the late antique architectural tradition. Just from the pursuit of an ideal "classic" placed out of time, he creates difficulty in dating the Baptistery, similar to what occurs for other Italian medieval monuments of strong classical style, like the church of St. Alexander in Lucca or the Basilica of St. Salvatore in Spoleto with the nearby Temple of Clitumnus .