On your fourth day, take a day trip to Ravenna, a city famous for its stunning Byzantine mosaics. Explore the UNESCO-listed monuments, including the Basilica di San Vitale and the Mausoleum of Galla Placidia. Marvel at the intricate mosaic designs that date back to the 5th and 6th centuries. Visit the Dante's Tomb, dedicated to the famous Italian poet Dante Alighieri. Enjoy a leisurely lunch in one of Ravenna's charming trattorias before returning to Bologna in the evening.