Guided tour of Prato, the hidden treasure of the Middle Ages and the Renaissance. If you want to discover a different façade of Tuscany, Prato, a city located in the heart of Tuscany about 15 km from Florence, is the right place to visit. You can visit the imposing fortress built by the Holy Roman Emperor Frederick II of the Hohestaufen dynasty, the Church of Santa Maria delle Carceri, the cathedral dedicated to Saint Stephen.