The complex known as the Piazza dei Miracoli or Piazza Del Duomo in Pisa, Italy is made up of four prominent medieval buildings - the Cathedral, Baptistery, Bell Tower (Leaning Tower), and Campo Santo Cemetery. The buildings were constructed between the 11th-14th centuries and showcase a variety of architectural styles including Romanesque, Gothic, and Pisan Romanesque. They are renowned for their marble exteriors and significance in medieval art and architecture.