Updated 2026-05-08
Four Hundred Years of St Peter’s Basilica
In 2026, St Peter’s Basilica is marking 400 years since the dedication of the current church on 18 November 1626. For visitors, that anniversary is more than a history footnote: it is the reason there are special Bernini routes, linked exhibitions, liturgical events, and a sharper focus on the Urban VIII and Barberini story this year.
Quick take
The single most important thing to know is that the current basilica was not built in one year. Construction began in 1506 and was completed in 1626; the centenary marks the dedication of the rebuilt basilica to worship, not the start of construction.
Why this anniversary matters
The date 18 November 1626 marks the formal dedication of the current St Peter’s Basilica during the pontificate of Pope Urban VIII, born Maffeo Barberini. That matters because the basilica visitors enter today is the result of a long Renaissance and Baroque building campaign which replaced the much older Constantinian basilica that had stood on the site for more than a thousand years.
The centenary brings several strands of the story together at once: the end of the long rebuilding campaign, the Barberini papacy, and the rise of Gian Lorenzo Bernini, whose Baldachin, Chair of St Peter, and piazza colonnade still shape how the basilica is experienced today.
What is happening in 2026
As of 8 May 2026, the most relevant anniversary-era experiences for visitors are the official guided tour Bernini and the Barberini in St. Peter’s Basilica through 30 June 2026, the companion Palazzo Barberini exhibition through 14 June 2026, the Vatican Museums display on Barberini tapestries and the basilica’s dedication, and a programme of liturgical and musical events that continues into autumn.
Most useful dates still ahead
- 26 May 2026: second centenary meeting at the Altar of the Chair, with musical interludes by the Cappella Musicale Giulia.
- 30 June 2026: last scheduled day for the official Bernini and the Barberini guided tour inside the basilica.
- 13 October 2026: third centenary meeting announced in the basilica programme.
- 18 November 2026: the anniversary year is due to conclude with a Holy Mass announced for the 400th anniversary date itself.
Why Bernini and the Barberini are central to the story
Urban VIII was Bernini’s first and most influential patron, which is why the anniversary year keeps returning to the Barberini name. The relationship explains the bronze Baldachin over the papal altar, the monument to Urban VIII, and the broader Baroque language that became inseparable from St Peter’s.
For travellers, this makes the centenary especially useful: it turns what can otherwise feel like disconnected masterpieces into one coherent story about papal power, art, theology, and the making of Rome’s most famous church.
Which visitors should pay attention
If you are a first-time Vatican visitor, the anniversary matters because it adds a layer of context to an ordinary basilica visit and makes some specialist experiences available for a limited time. If you are returning to Rome, this is one of the rare years when there is a strong reason to revisit St Peter’s through a narrower, more interpretive lens rather than just queueing for the dome again.
Practical planning advice
The basilica itself remains free to enter. The anniversary events do not mean all experiences are bundled into one ticket: the Bernini guided tour has its own booking flow, the Palazzo Barberini exhibition has a separate museum ticket, and the Vatican Museums display is covered by museum admission rather than basilica access.
The cleanest pairing for art-focused visitors is Palazzo Barberini first, then the themed tour in the basilica. General visitors who mainly want Michelangelo’s dome, the Pietà, and the Vatican Grottoes can still keep the anniversary material as background reading and visit the basilica in the usual way.
Bottom line
The 2026 centenary matters because it lets visitors read St Peter’s Basilica as a living intersection of architecture, pilgrimage, papal symbolism, and Baroque art rather than as a single giant church on a Rome checklist. If you want the sharpest anniversary-specific experience, the Bernini and Barberini route is the one to look at first; if you want the wider story, the whole year revolves around the date 18 November 1626 and what it meant for the basilica that stands there now.