Explore the real-world places that appear in Angels & Demons by Dan Brown. Each location on the map shows what happens there in the novel, the real history of the place, and what's there today. Featured locations include St. Peter's Basilica, St. Peter's Square, Castel Sant'Angelo, Piazza Navona, Santa Maria della Vittoria and 9 more.
Vatican City — Papal Conclave, climax of the novel
St. Peter's Basilica is the heart of the novel's action. The College of Cardinals is locked inside the Vatican in conclave to elect a new pope after the sudden death of the previous pontiff. Robert Langdon races through the Basilica's cavernous interior as the clock ticks on an antimatter bomb hidden somewhere beneath Vatican City. The climax sees Camerlengo Carlo Ventresca dramatically branding himself in the Basilica's nave before stealing a helicopter and ascending over the city, detonating the antimatter in the sky above.
St. Peter's Basilica was constructed between 1506 and 1626 on the site of the 4th-century Constantinian basilica, itself built over the purported tomb of Saint Peter. Michelangelo, Bramante, and Bernini all contributed to its design. At 20,000 square meters, it is the largest church in the world.
St. Peter's Basilica remains the center of the Catholic Church and one of the most visited sites in the world, drawing millions of pilgrims and tourists annually. Visitors can climb the dome for panoramic views of Rome and the Vatican. The Papal Necropolis beneath it is open by guided tour.
Visit: St. Peter's Basilica (historic site)
Vatican City — Crowds gather as cardinals are murdered
St. Peter's Square becomes a gathering place for thousands of faithful who await news from the conclave. As evening falls and the cardinals go missing one by one, panic spreads through the crowd. Langdon and Vittoria Vetra move urgently through its vast ellipse, coordinating with Vatican security commander Olivetti. The square also serves as the staging ground for the novel's spectacular finale, where crowds watch the antimatter explosion ignite the sky above.
Designed by Gian Lorenzo Bernini between 1656 and 1667, St. Peter's Square is one of the greatest feats of Baroque urban design. Its sweeping colonnades — 284 columns arranged in four rows — embrace visitors in what Bernini called 'the motherly arms of the Church.' An ancient Egyptian obelisk, moved from the Circus of Nero, stands at its center.
St. Peter's Square remains fully open to the public and is the site of Papal audiences, major Catholic feast day celebrations, and the Pope's Sunday Angelus address. The square can hold up to 300,000 people. The obelisk and Bernini's twin fountains are intact and iconic.
Visit: St. Peter's Square (landmark)
Lungotevere Castello — Illuminati lair and final confrontation
Castel Sant'Angelo is revealed as the secret lair of the Illuminati, connected to the Vatican by the secret Passetto di Borgo corridor. Langdon and Vittoria track the assassin here after discovering the branded, murdered cardinal. The Hassassin uses the castle's underground chambers to hold Cardinal Baggia — the preferiti — prisoner. Langdon dramatically descends into its depths, eventually confronting the killer and uncovering the final pieces of the Illuminati conspiracy.
Built between 123 and 139 AD as a mausoleum for Emperor Hadrian and his family, Castel Sant'Angelo was converted into a papal fortress in the Middle Ages. A secret corridor called the Passetto di Borgo — built in 1277 — connects it directly to the Vatican, allowing popes to flee in times of danger. Popes used it as a refuge during sieges, including the Sack of Rome in 1527.
Castel Sant'Angelo is now the Museo Nazionale di Castel Sant'Angelo, open to the public. Visitors can walk the Passetto, explore papal apartments, and enjoy spectacular views from the rooftop terrace. The famous bronze statue of the Archangel Michael crowns its summit.
Visit: Museo Nazionale di Castel Sant'Angelo (museum)
First Altar of Science — Cardinal Ebner found drowned
Piazza Navona is the first of the four Illuminati 'Altars of Science,' each representing one of the ancient elements: Earth, Air, Fire, and Water. The element associated with Navona is Water. Cardinal Ebner, one of the four preferiti cardinals, is found drowned face-down in the Fontana dei Quattro Fiumi — Bernini's Fountain of the Four Rivers — with the Illuminati ambigram for 'Earth' burned into his chest. Langdon and Vittoria arrive too late to save him, with Vatican police swarming the baroque piazza.
Piazza Navona was built on the site of the ancient Stadium of Domitian, constructed around 86 AD. Its elongated oval shape still traces the original footprint of the stadium. The centerpiece Fountain of the Four Rivers was designed by Gian Lorenzo Bernini in 1651 and represents the four great rivers of the continents known at the time: the Nile, Ganges, Danube, and Río de la Plata.
Piazza Navona is one of Rome's most beloved public squares, lined with restaurants, cafés, and street artists. Bernini's Fountain of the Four Rivers remains its central masterpiece. At Christmas it hosts Rome's most famous holiday market. The square is pedestrian-only and open around the clock.
Visit: Piazza Navona (landmark)
Via XX Settembre — Second Altar of Science, Cardinal Lamassé burned
Santa Maria della Vittoria is the Second Altar of Science, corresponding to the element of Fire. Cardinal Lamassé is found here, burned alive and staked to the floor inside the church. Langdon realizes the Illuminati's 'Path of Illumination' traces through Rome's churches, each with a Bernini sculpture hinting at the next location. The church houses Bernini's legendary 'Ecstasy of Saint Teresa,' which Langdon recognizes as an Illuminati marker embedded by Bernini himself — a sculptor who was secretly a member of the brotherhood.
Santa Maria della Vittoria was built between 1608 and 1620 and is dedicated to Our Lady of Victory, following the Catholic victory at the Battle of White Mountain. Its most celebrated work is Gian Lorenzo Bernini's 'Ecstasy of Saint Teresa' (1647–1652), housed in the Cornaro Chapel — widely considered one of the supreme achievements of Baroque sculpture.
Santa Maria della Vittoria remains an active church and is freely open to visitors who wish to view Bernini's 'Ecstasy of Saint Teresa.' The chapel is beautifully lit and well-preserved. The church is a popular stop on Rome's artistic and Baroque architecture tours.
Visit: Santa Maria della Vittoria (historic site)
Third Altar of Science — Cardinal Guidera found impaled
Piazza del Popolo is the Third Altar of Science, corresponding to Air. Cardinal Guidera is found here with iron spikes driven through his lungs — a brutal evocation of the element — his body displayed at the base of one of the twin churches flanking the piazza. Langdon and Vittoria once again arrive moments too late, the Hassassin having vanished into the Roman night. The macabre scene draws crowds and overwhelms the Vatican police effort to contain the Illuminati's public spectacle.
Piazza del Popolo — the 'People's Square' — was for centuries the northern gateway into Rome, as travelers arriving via the Via Flaminia from the north would enter the city here. The central obelisk, originally from Heliopolis in Egypt, was brought to Rome by Augustus in 10 BC. The twin Baroque churches of Santa Maria dei Miracoli and Santa Maria in Montesanto frame the square's southern entrance.
Piazza del Popolo is a grand public square open to all and a major Rome landmark. Its Egyptian obelisk, twin churches, and the Porta del Popolo gate are all intact. The piazza is a pedestrian zone and hosts concerts, cultural events, and political rallies. The Pincian Hill terrace above offers the city's best views.
Visit: Piazza del Popolo (landmark)
Piazza Navona — Bernini's Illuminati landmark
Bernini's Fountain of the Four Rivers is the specific site where Cardinal Ebner's drowned body is discovered by Langdon and Vittoria. It is the first of the Illuminati 'altars,' embodying the element of Water. Langdon recognizes the fountain as a work of Bernini's that encodes Illuminati symbolism — the obelisk at its center pointing skyward like a finger of God. The discovery here launches Langdon's race along the 'Path of Illumination,' connecting four Bernini works across Rome.
Completed in 1651, the Fountain of the Four Rivers was Bernini's most ambitious secular commission, ordered by Pope Innocent X. The central travertine rock supports four colossal river gods: the Nile (veiled, since its source was unknown), the Ganges, the Danube, and the Río de la Plata. The Egyptian obelisk surmounting it was taken from the Circus of Maxentius.
The Fountain of the Four Rivers remains one of Rome's most celebrated and photographed monuments. It is beautifully illuminated at night and freely viewable from the piazza at all hours. Restoration work has been undertaken in recent decades to preserve the travertine and marble from weathering.
Visit: Fountain of the Four Rivers (monument)
Vatican City — Langdon's clandestine research into the Illuminati
Langdon is granted extraordinary emergency access to the Vatican Secret Archives to research the Illuminati and their historical connection to the Catholic Church. Sealed inside a hermetically pressurized reading room, he frantically searches for Galileo's banned treatise 'Diagramma della Verità,' which is believed to contain the path of the Illuminati's altars across Rome. Racing against time and against a strict oxygen limit, Langdon locates the document and deciphers its coded message pointing to the first church on the path.
The Vatican Apostolic Archive — long known as the Vatican Secret Archives — contains approximately 85 kilometers of shelving with documents dating back over twelve centuries. The word 'secret' historically meant 'private' rather than hidden. It holds correspondence of popes, records of the Inquisition, and documents of enormous historical significance. Scholars have been permitted limited access since 1881.
The Vatican Apostolic Archive (renamed from 'Secret' to 'Apostolic' in 2019) is accessible to accredited scholars by application. There is no general public access. An exhibition called 'Lux in Arcana' has toured internationally displaying original documents. The archive building itself is within the restricted Vatican City grounds.
Piazza della Rotonda — Illuminati meeting place and Raphael's tomb
The Pantheon appears in the novel as a site of deep Illuminati and scientific significance — Langdon references it as a temple to all the gods of science hidden in plain sight. Raphael, whose tomb lies inside, is connected to the Renaissance brotherhood of artist-scientists who secretly supported the Illuminati. Langdon uses his knowledge of the building's architecture and history to trace the intellectual lineage that connects Rome's Baroque monuments to the hidden brotherhood of Galileo and Bernini.
The Pantheon was built by Emperor Hadrian around 118–128 AD on the site of an earlier temple by Agrippa. Its unreinforced concrete dome — 43.3 meters in diameter with an open oculus at the top — remained the world's largest for over 1,300 years. It was converted into a Christian church in 609 AD, which preserved it through the Middle Ages. Raphael is buried here, as are several Italian kings.
The Pantheon is one of the best-preserved ancient Roman buildings in the world and one of Rome's most visited monuments. Since 2022 it charges an entry fee. The oculus still allows rain to fall directly onto the marble floor, draining through ancient hidden channels. It remains an active church as well as a national monument.
Visit: Pantheon (historic site)
Meyrin, Switzerland — Origin of the antimatter threat
The novel opens at CERN, where physicist Leonardo Vetra has been murdered and a canister of antimatter stolen. Vetra's adopted daughter, physicist Vittoria Vetra, had partnered with him to create the world's first significant quantity of antimatter — a religious and scientific experiment meant to bridge faith and science. Langdon is summoned from Harvard to CERN after a Hassassin leaves the Illuminati symbol branded onto Vetra's chest. Vittoria and Langdon depart CERN for Rome with only hours before the antimatter annihilates Vatican City.
CERN — the Conseil Européen pour la Recherche Nucléaire — was founded in 1954 near Geneva on the Franco-Swiss border. It is the world's largest particle physics laboratory and operates the Large Hadron Collider, the world's most powerful particle accelerator. CERN scientists Tim Berners-Lee invented the World Wide Web there in 1989. The laboratory employs over 2,500 staff and hosts thousands of visiting scientists.
CERN offers free public tours of its facilities, including the permanent exhibition 'Universe of Particles' in the Globe of Science and Innovation. Guided tours of the accelerator complex are available by advance reservation. The LHC ring — 27 kilometers in circumference — spans the Swiss-French border underground.
Visit: CERN Science Gateway (museum)
Vatican City — The Hassassin's escape route and final chase
The Hassassin — the ruthless killer employed by Janus to execute the four cardinals — uses the colonnades of St. Peter's Square as cover during his escape after each murder. The final pursuit culminates here as Langdon chases him through the colonnade's massive shadow-filled arches. Vittoria is rescued from the Hassassin's captivity in the Castel Sant'Angelo nearby. The colonnade's sweeping arms, which Bernini described as the motherly embrace of the Church, become a setting for violence and pursuit rather than spiritual comfort.
Bernini's colonnade was constructed from 1656 to 1667 under the patronage of Pope Alexander VII. It consists of 284 travertine columns and 88 pilasters arranged in four rows, topped by 140 statues of saints. The colonnade was designed to be seen from a specific point in the piazza where all four rows of columns perfectly align and appear as a single row.
The colonnade is freely accessible as part of St. Peter's Square. Visitors can walk through it and observe the famous alignment perspective from the marked 'center of the colonnade' paving stone. Swiss Guards maintain posts at the Vatican entrances nearby.
Visit: St. Peter's Square Colonnade (landmark)
Piazza del Popolo — Chigi Chapel and Bernini's 'Habakkuk and the Angel'
Santa Maria del Popolo contains the Chigi Chapel, where Bernini's sculpture 'Habakkuk and the Angel' — with the angel's outstretched arm pointing dramatically — serves as one of the Illuminati directional markers on the Path of Illumination. Langdon deciphers that the angel's gesture points across Rome toward the next altar. The chapel is also where Langdon finds clues left encoded by Galileo in his sculpted markers, part of the Illuminati's centuries-old trail designed to lead initiates to their secret meeting place.
Santa Maria del Popolo was founded in 1099 and rebuilt in its current Renaissance form beginning in 1472. The Chigi Chapel was designed by Raphael for the wealthy banker Agostino Chigi and later completed by Bernini. The church also houses two Caravaggio masterworks — 'Conversion of Saint Paul' and 'Crucifixion of Saint Peter' — in the Cerasi Chapel.
Santa Maria del Popolo is an active church freely open to visitors. The Chigi Chapel and its Bernini sculptures, along with the two Caravaggio paintings, draw art historians and tourists from around the world. The church is located directly at the Porta del Popolo entrance to the piazza.
Visit: Santa Maria del Popolo (historic site)
Beneath St. Peter's Basilica — The antimatter canister's hiding place
Deep beneath St. Peter's Basilica, in the ancient Papal Necropolis known as the Scavi, the antimatter canister — capable of annihilating everything within hundreds of meters — is hidden by the Illuminati. Langdon and Vatican security descend into the cramped underground chambers, passing the tombs of popes and the purported tomb of Saint Peter himself, racing to locate the bomb before it detonates. The contrast of the sacred necropolis with the ticking antimatter canister is one of the novel's most viscerally tense sequences.
The Papal Necropolis beneath St. Peter's was discovered during excavations ordered by Pope Pius XII between 1940 and 1949. It contains a Roman-era cemetery of both pagan and Christian tombs, overlaid by the successive basilicas above. A monument believed to mark the tomb of Saint Peter — the Aedicula — was identified during these excavations, lending archaeological support to the tradition.
The Scavi — the Vatican Necropolis — can be visited by advance reservation through the Vatican's Excavations Office (Ufficio Scavi). Tours are limited in number and highly sought after. The site remains one of the most moving and archaeologically significant spaces in the Christian world.
Visit: Vatican Necropolis (Scavi) (historic site)
Central Rome — The Hassassin disposes of evidence; Langdon's survival
The Tiber River runs through several crucial scenes. After a brutal encounter at Castel Sant'Angelo, Langdon plunges into the Tiber below the castle walls during his attempt to stop the Hassassin. Badly injured and swept downstream in the current, Langdon is eventually pulled to safety. The river — which has divided and connected Rome for millennia — becomes a metaphor for the thin line between survival and death that Langdon walks throughout the novel's single harrowing day.
The Tiber is Italy's third-longest river, running 406 kilometers from the Apennine Mountains to the Tyrrhenian Sea at Ostia. Ancient Rome was founded on its banks, and the river served as the city's commercial lifeline for centuries. The Tiber flooded Rome regularly and catastrophically until modern embankments — the Lungotevere walls — were constructed in the 1870s and 1880s.
The Tiber flows through central Rome largely contained within its 19th-century embankments. A network of riverside paths — the Lungotevere — runs along both banks. In recent years, sections near Castel Sant'Angelo have been developed with beach clubs, bars, and cultural spaces open in summer. The river is not swimmable but is navigable by boat.
Visit: Lungotevere Riverside Walk (park)
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