The monastery complex of St. Stephen, also called the "Seven Churches", is located on piazza Santo Stefano. According to legend, the complex, the prototype of which was the Church of the Holy Sepulcher in Jerusalem, began to be built on the initiative of Bishop Petronius. He was bishop of Bologna in 430-451. Saint Petronius is considered the patron saint of Bologna. The complex was built on the site of the pagan temple of Isis. Historical research confirms the ancient age of buildings. The Church of John the Baptist or the Crucifixion dates back to the 8th century, the Church of the Holy Sepulcher (or Golgotha) dates back to about the 5th century (rebuilt in the 12th century).→