Explore Rome following the trail of Robert Langdon in Dan Brown's best-selling novel, Angels and Demons. The 3.5-hour tour begins at Pantheon, where Robert Langdon, the protagonist of Dan Brown's best-selling novel, arrives having misunderstood a clue. His intended destination was the church of Santa Maria del Popolo, and that is the tour's second stop. The church is noted for the Chigi Chapel, where Langdon found the first dead cardinal, branded with the word earth on his chest. Your next stop will be St. Peter's Basilica, the center of Christianity. In the middle of St. Peter’s Square you’ll find an obelisk surrounded by a wind compass rose. On the west ponente oval tile the protagonist found another dead cardinal, branded with the word air. After this, Langdon enters the Vatican’s secret archives to look for information about the Illuminati. From the Vatican you’ll head to the Church of Santa Maria della Vittoria, where you’ll see Bernini's sculpture, Estasi di Santa Teresa. It was here that Langdon found the third dead cardinal, who was branded with the word fire. Your guide will take you through the most important places in the ancient city center, including Repubblica Square, and Navona Square, where you’ll see Bernini's stunning Fountain of the 4 Rivers and the obelisk. According to the book, Langdon finds the last dead cardinal here, branded with the word water. From Navona Square you’ll head to the last stop, Castel Sant’Angelo, a gathering place of the Illuminati, and hear about the passetto, a hidden passage that leads to Vatican City. This shortcut was used by past popes as a way to escape, and in the book it is used as a hideout for the assassin.