St. Peter’s Square — What to Know

St. Peter’s Square (Piazza San Pietro) is free to visit and open 24 hours — no ticket, no booking, no dress code enforcement outdoors. It is enclosed by Gian Lorenzo Bernini’s double elliptical colonnade of 284 columns and 88 pilasters, completed in 1667. At the centre stands a 25.5-metre ancient Egyptian obelisk brought to Rome by Emperor Caligula in 37 AD. Two Baroque fountains by Carlo Maderno and Bernini flank the obelisk. The square is the site of the Pope’s weekly Papal Audience (Wednesdays), the Urbi et Orbi blessing (Christmas and Easter), and large-scale liturgical events throughout the year.

St. Peter’s Square is one of the great public spaces of the world — a vast ellipse that opens from the narrow medieval streets of the Borgo neighbourhood as a sudden, overwhelming expansion of sky and scale. Bernini designed it in the 1650s–1660s to provide a worthy processional approach to St. Peter’s Basilica and to accommodate the enormous crowds who came to receive the Pope’s blessing from the central balcony. Standing at the centre of the colonnade and looking back toward the Basilica, the experience is still one of the most powerful spatial sequences in any city.

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Bernini’s Colonnade — The Architecture

Bernini’s colonnade consists of two curved arms of columns that embrace the elliptical piazza. The colonnade has 284 travertine columns and 88 pilasters arranged in four rows, topped by 140 statues of saints. The arms curve outward from the facade of the Basilica and, as Bernini intended, create a sense of the Church reaching out to embrace the faithful gathering in the square. When viewed from the focal points marked by round stones embedded in the pavement (‘you are standing on the focal point of the colonnade’), all four rows of columns align visually into a single row — a perspective effect Bernini built into the geometry of the design.

The Optical Illusion — Stand on the Focal Points

Two circular stones set into the pavement of St. Peter’s Square, one on either side of the obelisk (roughly between the obelisk and each fountain), mark the focal points of Bernini’s elliptical colonnade. Standing on either of these stones and looking toward the colonnade, the four rows of columns collapse into a single row — all 284 columns align perfectly into one. This was deliberately engineered by Bernini as a demonstration of the geometric precision of his design. The focal point stones are small and easy to miss — look for them at roughly the midpoint between the obelisk and each fountain.

The 140 Saints on the Colonnade Roof

The roofline of Bernini’s colonnade is lined with 140 statues of saints, each approximately 3.2 metres tall, designed by Bernini’s workshop. They stand silhouetted against the Roman sky, their gestures varied — some holding the instruments of their martyrdom, some in attitudes of prayer or proclamation. Looking up at them from directly below in the colonnade produces one of the most distinctive visual experiences in the square.

The Vatican Obelisk

The obelisk at the centre of St. Peter’s Square is one of Rome’s most ancient monuments — an Egyptian red granite obelisk carved for Pharaoh Nectanebo I in the 4th century BC (or possibly earlier), without hieroglyphic inscriptions (unusual for an Egyptian obelisk). It was brought to Rome by Emperor Caligula in 37 AD and originally stood in Caligula’s circus on the Vatican hill — the site of early Christian martyrdoms including, according to tradition, the crucifixion of St. Peter. It was moved to its current position by Pope Sixtus V in 1586, a major feat of Renaissance engineering. The cross at the top of the obelisk was added at that time and is said to contain a relic of the True Cross.

The Two Fountains

Two large Baroque fountains flank the obelisk in St. Peter’s Square: the right-hand fountain (facing the Basilica) was designed by Carlo Maderno and constructed in 1614; the left-hand fountain was designed by Bernini in the 1670s to match Maderno’s. Both produce a continuous fall of water from a central spray, creating a gentle sound that softens the noise of the crowds. The fountains are fed from the Acqua Paola aqueduct, restored under Pope Paul V in 1612.

Papal Audiences — Wednesdays

Every Wednesday morning (usually at 9:30am or 10:00am), the Pope holds a General Audience in St. Peter’s Square (or in the Paul VI Audience Hall in winter). The Audience is open to all — free tickets are required and must be requested in advance from the Prefecture of the Papal Household. During the Audience, St. Peter’s Basilica is closed to visitors until approximately 12:30pm. See our Papal General Audience ticket page for how to request tickets.

Best Times & Photo Spots

• Early morning (7:00–8:30am): The square is near-empty; the Basilica facade catches the morning light from the east; the best time for unobstructed photography of the colonnade, obelisk, and facade
• Late evening: The Basilica is illuminated from dusk; the square has a different quality at night — quieter, the travertine columns lit from below
• From above (St. Peter’s dome): The view of the full elliptical piazza from the exterior gallery of the dome is the most complete way to understand Bernini’s geometry
• The focal point stones: Midpoint between obelisk and each fountain — stand here to see all four colonnades collapse into one
• Via della Conciliazione: The broad avenue leading from Castel Sant’Angelo to the square — the classic approach on foot from central Rome, built by Mussolini in 1937 to open up the view of the Basilica facade

Practical Information

• Access: Free, 24 hours — no ticket, no booking required
• Dress code: No dress code enforced outdoors in the square; the code applies at the Basilica entrance
• Crowds: Peak 10am–3pm daily; Wednesday mornings during Papal Audience are among the busiest times
• Security: Metal detector screening applies at the entrance to the colonnade and at the Basilica entrance — allow 15–30 minutes at busy times
• Photography: Unrestricted outdoors; permitted inside the Basilica (no flash); strictly prohibited in the Sistine Chapel

Frequently Asked Questions

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