The Pisa Baptistery, also known as the Baptistery of St. John, is a circular building located on the left side of the Piazza dei Miracoli in Pisa. The building is a mixture of Romanesque and Gothic styles, especially the huge dome with a diameter of 35 meters, which is particularly eye-catching. The Baptistery is the largest baptistery in Italy, with a large baptistery pool inside. It is also said that the sound absorption and lighting inside the baptistery are very good. The decoration outside the baptistery is also very beautiful.