Siena Cathedral is not a single-room attraction, and since March 2026 it is not a single ticket either. The Opera della Metropolitana reorganised how the complex is visited, and the result is three separate routes at three separate prices — with a fourth situation, free winter entry, that almost no guide mentions.
If you have read an older article quoting one price for everything, that structure no longer exists. This page explains what replaced it, what each route actually contains, and which one is worth your money.
Quick answer
There are three routes, not one pass. The cathedral with the Piccolomini Library is the cheap entry. The OPA SI Pass is the full circuit and includes the underground Sotto il Duomo — Percorsi di Luce videomapping route. The Gate of Heaven is a separate, bookable climb into the roof structure.
Every price moves with one thing: whether the marble floor is uncovered. In 2026 that is 27 June to 31 July and 18 August to 15 November.
For most first-time visitors with half a day, the OPA SI Pass at €13 (€15 with the floor uncovered) is the right buy — it is valid three consecutive days, so it survives a change of plan. If you have ninety minutes and only want the building itself, take the cathedral and library ticket instead.
The 2026 prices, by route
Checked against the Opera's own published tariffs on 16 August 2026. The columns are the two states of the floor.
| Route | Floor covered | Floor uncovered |
|---|---|---|
| Cathedral + Piccolomini Library | €5.00 | €8.00 |
| OPA SI Pass (full complex + Sotto il Duomo) | €13.00 | €15.00 |
| Gate of Heaven (roof route) | €7.00 | €10.00 |
Two further rates are published: reduced entry at €8.00 for groups over 14 and groups with a guide during the uncovered-floor period, and free admission for anyone born in or resident in Siena, which covers both the cathedral and the OPA SI Pass route. If you are staying with local hosts, it is worth knowing that the person showing you round may walk in free.
All tickets are valid for three consecutive days from the date of issue. This is the most underused feature of the complex: you are not buying one afternoon, you are buying a window. Split the museum off from the cathedral and do them on different days when the light and your legs suit.
What changed in March 2026, and why older guides are wrong
Until this year the complex was sold largely as one pass. From March 2026 the Opera separated the visit into the three routes above and repriced them, adding the underground videomapping route to the OPA SI Pass and pulling the roof climb out as its own bookable product.
The practical consequence for a traveller is that almost every English-language page describing Siena Cathedral tickets is now describing a product that no longer exists at that price. Figures in circulation from the previous structure — and resale prices well above face value — are still the top results for the obvious searches. Before you pay anything, check the price against the two states of the floor calendar below; if a seller cannot tell you which state your date falls in, they are not looking at the official tariff.
The floor: the single fact that governs everything
Siena's cathedral floor is fifty-six inlaid marble panels worked between the fourteenth and the sixteenth centuries — a narrative pavement that Vasari called the most beautiful, largest and most magnificent ever made. For most of the year it is boarded over to protect it, and you walk across plain covering without seeing any of it.
In 2026 the floor is uncovered from 27 June to 31 July, and again from 18 August to 15 November. Outside those windows — 1 January to 26 June, 1 to 17 August, and 16 November to 31 December — it is covered.
Three things follow that are worth planning around:
- The two-week August gap is real and catches people out. The floor goes back under cover for the first seventeen days of August, which includes the Palio of 16 August and the Ferragosto week when Siena is at its fullest. Arriving in that fortnight expecting the marble is the most common disappointment at this cathedral.
- The uncovering runs deep into November. Mid-October to mid-November gives you the floor, thin crowds and low autumn light through the nave at the same time — the best combination the cathedral offers all year, and the reason our November guide rates the month more highly than most.
- The uncovered price is not a surcharge on a normal visit. You are paying a few euro more to see the thing the building is most famous for. When the floor is up, the cathedral is a different room.
The free winter window, and the ambiguity in it
This is the best-value fact on this page and the one least likely to appear elsewhere. The Opera has published free cathedral entry across the winter months — 1 November to 24 December, and 7 January to 28 February — with the Piccolomini Library at €2.00 and the OPA SI Pass reduced to €8.00.
For a traveller that is a serious saving. A winter visit to Siena that includes the cathedral, the library and the full pass costs less than the cathedral alone in July.
Now the honest caveat, because the two published calendars overlap. The floor is uncovered until 15 November, and the uncovered-floor tariff applies in that period; the free-winter announcement begins on 1 November. The Opera's own pages do not resolve which rule governs 1–15 November, and we could not establish it. Our advice for those dates: budget the uncovered-floor fares — €8 for cathedral and library, €15 for the pass — and treat free entry as an upside rather than a plan. From 16 November the two calendars agree and the winter rates are unambiguous.
Which route to buy
Cathedral + Piccolomini Library — €5, or €8 with the floor
The cheap, focused visit. You get the striped nave, Nicola Pisano's pulpit, the dome, and the library — a small frescoed room off the north aisle where Pinturicchio and his workshop painted ten scenes from the life of Pius II between 1503 and 1508, in colours that look as though they were finished last year. Ninety minutes is enough.
Buy this if: you are on a day trip with a fixed return bus, you have already committed the afternoon elsewhere, or the museum circuit does not appeal.
OPA SI Pass — €13, or €15 with the floor
The full complex: the cathedral and library, the Museo dell'Opera (Duccio's Maestà, the altarpiece carried through the streets in 1311, is here and is the single greatest object in Siena — our Sienese painting guide explains what you are looking at), the panorama from the unfinished façade, the Baptistery, the Crypt, the Oratory of San Bernardino, and the Sotto il Duomo — Percorsi di Luce route.
Buy this if: you have half a day or more, or any interest in painting. The arithmetic is not close — the pass costs roughly two and a half times the cathedral ticket and contains six or seven times as much.
Gate of Heaven — €7, or €10 with the floor
A guided route up into the structure above the nave, along walkways inside the roof, with views down into the cathedral and out over the city from a height nothing else in Siena offers. It is a separate ticket, it is not included in the OPA SI Pass, and it must be booked — online or at the ticket office subject to remaining availability. Numbers are limited by the walkways themselves.
Buy this if: you have booked ahead and you are comfortable on narrow stairs at height. It is the one part of the complex that genuinely sells out, and the one where turning up hopeful fails most often.
And when you reach the Facciatone's panorama on the pass, know what you are standing on: the façade of the cathedral Siena began doubling in 1339 and lost to the plague — the year the city stopped explains why the nave below you was never built.
Sotto il Duomo — Percorsi di Luce
The underground route now bundled into the OPA SI Pass deserves its own paragraph, because the name tells you nothing.
It runs from the Baptistery down through the spaces created by the cathedral's enlargement begun in 1317 — under the foundations of the left transept — and ends in the seventeenth-century hall of the Oratory of San Giovannino, a church that had been closed to the public for decades before the route recovered it. The journey is staged as a 3D videomapping projection using around forty laser projectors, with multilingual headsets.
It divides opinion, and honestly: if you came to Siena for medieval painting, this is not that, and you may find the son-et-lumière treatment at odds with the building. If you are travelling with teenagers, or with anyone whose patience for altarpieces is finite, it is the part of the complex they will talk about afterwards. Either way you are no longer choosing — it is inside the pass.
Opening hours in 2026
As published for the periods concerned, checked 16 August 2026:
- During the uncovered-floor periods (27 June–31 July, 18 August–30 October): 10:00–19:00, with public holidays 09:30–18:00.
- 1 November to 24 December: 10:30–17:30.
- Last admission is 30 minutes before closing across the complex.
Two cautions. The cathedral is a working church: Sunday mornings, feast days and services restrict or close visitor access, and the schedule is not the same for every component of the complex. And individual sites within the complex keep their own hours, so a plan that assumes the museum is open because the cathedral is will occasionally fail. Check the official calendar for your specific date — the hours above are the pattern, not a promise for every day.
Where to buy, and how to avoid paying twice
Tickets are sold online, through the Opera's call centre, and at two physical offices: Piazza Duomo 7, beside the cathedral, and the "Dear Guests" visitor centre at Via di Città 48, near Piazza del Campo. The second is the useful one — it is on the walk up from the Campo, it is usually quieter than the cathedral window, and buying there means you arrive at the Duomo holding a ticket rather than joining a queue in the sun.
Resale markups are the main risk here. Third-party sites list the OPA SI Pass well above the Opera's own price, and some bundle it with services you have not asked for. The Opera sells directly. If a price does not match the table above for your date's floor state, you are looking at a markup, an old tariff, or both.
Guided visits of the museum complex with authorised guides are arranged at the ticket office rather than online.
Dress code, accessibility and how long to allow
Dress code. This is an active cathedral and the rule is enforced at the door: shoulders and knees covered, for everyone. In July a thin scarf in the day bag is the difference between walking in and walking back to the hotel.
Accessibility. The cathedral and museum are broadly manageable; the Gate of Heaven is not — it is stairs and narrow walkways by definition, and the panorama from the unfinished façade is reached by a climb. Anyone with mobility limitations should plan the pass around the ground-level components and treat the high routes as optional.
Time. Cathedral and library, ninety minutes. Add the Museo dell'Opera and the façade panorama and you are at three hours. The whole complex including the underground route and the Gate of Heaven is a full day, which is precisely why the three-day validity matters — split it. Our one day in Siena itinerary shows how the cathedral fits a single-day visit, and the day trip versus overnight comparison covers whether one day is enough at all.
How we checked these details
Checked 16 August 2026, by web research against the Opera della Metropolitana's own published material; direct page fetches are blocked in our environment, so this rests on search-surfaced official content rather than pages we opened.
Verified: the March 2026 reorganisation into three visit routes; the cathedral and Piccolomini Library at €5.00 rising to €8.00 with the floor uncovered; the OPA SI Pass at €13.00 and €15.00; the Gate of Heaven at €7.00 and €10.00 across the same two states; the €8.00 reduced rate for groups over 14 and guided groups during the uncovered period; free access for those born in or resident in Siena, covering the cathedral and the OPA SI Pass; three-consecutive-day validity; the 2026 floor-uncovering periods of 27 June–31 July and 18 August–15 November, with the covered bands of 1 January–26 June, 1–17 August and 16 November–31 December; the free winter cathedral entry of 1 November–24 December and 7 January–28 February with the library at €2.00 and the pass at €8.00; the components of the complex including the Museo dell'Opera, the unfinished-façade panorama, the Baptistery, the Crypt and the Oratory of San Bernardino; the Sotto il Duomo — Percorsi di Luce route from the Baptistery to the Oratory of San Giovannino through the spaces of the 1317 enlargement, presented by 3D videomapping with around forty laser projectors and multilingual headsets; the Pinturicchio workshop frescoes of 1503–1508 in the Piccolomini Library; the ticket offices at Piazza Duomo 7 and Via di Città 48; the requirement to book the Gate of Heaven; and the published opening hours of 10:00–19:00 in the uncovered period with 09:30–18:00 on public holidays, 10:30–17:30 from 1 November to 24 December, and last admission 30 minutes before closing.
Conflicts we could not resolve, stated rather than smoothed over. First, the free-winter window and the uncovered-floor period overlap between 1 and 15 November 2026, and the Opera's pages do not say which governs; we tell you to budget the uncovered-floor fare for those dates. Second, an older tariff of €14 and €16 for the OPA SI Pass remains findable on the Opera's own site alongside the new €13 and €15; we have followed the March 2026 reorganisation announcement, which is the more recent and more specific source, but you should expect to see both figures while you research. Third, one official page gives the uncovered period's summer hours as running to 30 October while the tariff calendar runs the uncovered period to 15 November — so the hours for the first fortnight of November are the ones most worth confirming for your date.
Also unconfirmed: the current reduced and child rates for each of the three routes under the new structure, the 2027 floor calendar and tariffs, and Gate of Heaven session times and group sizes. Prices and calendars at this complex changed materially in 2026 — verify on the Opera's own channels before relying on any figure here.
We have no commercial relationship with the Opera della Metropolitana or any ticket seller. No booking made from this page pays us anything, and no reseller is recommended.
Final thoughts
The cathedral is the reason a great many people come to Siena, and it is the one attraction here where the ticket decision genuinely changes the visit rather than just the bill. Get the floor state right, buy the pass rather than the cheap entry unless your day is genuinely short, and use the three days you have paid for instead of compressing everything into one exhausted afternoon.
And if your dates are flexible at all: come between mid-October and mid-November. The marble is up, the queues are gone, and the cathedral does the thing it was built to do — turn ordinary daylight into something worth having travelled for.