The Duomo di Siena is the Cathedral of Santa Maria Assunta, in Piazza del Duomo, Siena, within the city’s historic centre. Its monumental complex brings the cathedral together with a library, baptistery, crypt and museum, making the piazza a useful starting point for exploring several parts of Siena’s religious and cultural history.
- Where: Piazza Duomo, Siena’s historic centre.
- What to allow: Opera Duomo Siena gives about two hours for the OPA SI PASS itinerary.
- Tickets: The OPA SI PASS covers the complex’s museum sites and is valid for three consecutive days from its date of issue.

Finding the cathedral and piazza
Siena Cathedral stands in Piazza Duomo, inside the city’s historic centre. From Domus Il Palio, you can walk to the centre in about 21 minutes; the cathedral is a natural stop once you reach this central area.
The cathedral is not directly accessible by car. If you are driving, Opera Duomo Siena recommends Parcheggio Duomo when arriving from the Siena Ovest motorway exit, or Parcheggio Il Campo when arriving from Siena Sud. From either car park, continue on foot into the historic centre.
The piazza gives you an easy point of orientation: the cathedral is the centrepiece, while the other sites in the monumental complex offer reasons to spend more time at the complex beyond a look at the exterior. For a wider walking plan, see how to fit Siena’s sights into a day.

What the cathedral complex includes
The cathedral complex combines the Cathedral of Santa Maria Assunta with several adjoining sites and viewpoints. Opera Duomo Siena describes the cathedral as an important example of an Italian Romanesque-Gothic cathedral.
The complex includes the Cathedral, Piccolomini Library, Gate of Heaven, Baptistery, Crypt, Museo dell’Opera, Panorama from the Unfinished Façade and Oratory of St. Bernardino. The OPA SI PASS covers the complex’s museum sites, and its itinerary can be completed in about two hours.
The scale of the cathedral reflects an ambitious plan from Siena’s past. In 1339, the city planned a cathedral so large that the existing Duomo would become its transept. That project was never completed, leaving the Unfinished Façade as part of the complex’s story.
If you want to add another museum visit elsewhere in the city, use this guide to choose a museum in Siena.

Tickets, timed visits and seasonal areas
You can visit the cathedral and other parts of the complex with tickets sold online, through the call centre, or at ticket offices at Piazza Duomo 7 and the Dear Guests Visitor Center at Via di Città 48.
The OPA SI PASS is valid for three consecutive days from its date of issue and covers the complex’s museum sites. A separate Gate of Heaven ticket is also available; it can be bought online or at the ticket office, subject to remaining availability.
Opening hours can vary because of religious services, and the last admission is 30 minutes before closing. For the current schedule and ticket details, check the official site before you go: Opera Duomo Siena is the operator.
The cathedral has a dedicated access ramp on its left-hand side. Opera Duomo Siena states that the Museum, Crypt and Baptistry do not currently have systems for disabled access, so check with the operator if you need access information for those areas.

Pairing the Duomo with nearby sights
Piazza del Campo and Piazza Duomo are among Siena’s cultural sights, and both are in the historic centre. You can pair time at the cathedral complex with a walk through the historic centre, then continue to Piazza del Campo.
For a straightforward visit, start with the cathedral and decide whether to add other sites in the complex before leaving the complex. The two-hour OPA SI PASS itinerary gives a useful guide to the time needed for its route. If you have longer, the pass’s three-day validity lets you spread visits across consecutive days.
Booking a stay at Domus Il Palio gives you the option of taking more time to explore the cathedral complex and the historic centre.
FAQs
What is the official name of Siena Cathedral?
It is the Cathedral of Santa Maria Assunta, commonly called the Duomo di Siena.
How long does the OPA SI PASS itinerary take?
Opera Duomo Siena says to allow about two hours for the itinerary.
Can you reach Siena Cathedral by car?
The cathedral is inside the historic centre and cannot be reached directly by car. Drivers can use the recommended parking options and continue on foot.
Does the OPA SI PASS cover the whole complex?
It covers the complex’s museum sites. The Gate of Heaven also has a ticket option of its own, subject to availability.
