Baptistery of Pisa

A rotunda originally built in the Romanesque style in the 14th century.

Saint John the Baptist (San Giovanni Battista), after whom this baptismal church in Siena was named, is - like Saint Joseph - a man on the threshold of the Old and New Testaments. His parents are Zacharias and Elizabeth. After the announcement of the incarnation of God through them, the Mother of God visits her relative Elizabeth, who will give birth to a son in old age, namely John the Baptist. He is half a year older than Jesus and is considered his forerunner/pioneer. He lives in the desert, preaches repentance from sins to the Jewish population and baptizes them in the Jordan. Jesus also comes there to be baptized, and is filled with the Holy Spirit who descends upon him from heaven.
The memorial day of San Giovanni Battista in the calendar of saints is June 24th, exactly half a year before 'Christmas Eve'.

If visiting the tower is impossible (fully booked, too expensive, ...), it is worth visiting the Babtisterium (approx. € 7). At the same time you get a free entrance ticket for the cathedral.