This Baptistery is based on the one that stands in Pisa. It is next to the cathedral that is available for $25 and the Torre Di Pisa which is available for $20. Or you could get the combined deal for $40 which not only has the Leaning Tower of Pisa, Baptistry and cathedral but the botanical gardens next to the Cathedral, the surrounding houses, the city walls and the curbs and grass sections.
A Baptistery, part of a church, or a separate building in connection with it, used for administering baptism. In the earliest examples, it was merely a basin or pool set into the floor. Later, the Christian Church set aside a separate structure for the ceremony.
In Christian architecture, the baptistery or baptistry is the separate centrally-planned structure surrounding the baptismal font. The baptistery may be incorporated within the body of a church or cathedral and provided with an altar as a chapel.