Cathedral including the Piccolomini Library, Piazza Duomo

Opening hours:
March 1 to May 31: Weekdays including Saturday: 10:30 am. - 7:30 p.m.
Sundays and holidays: 1:30 - 5:30 p.m. June 1 to August 31: Weekdays including Saturday: 10:30 am. - 8:00 p.m.
Sundays and holidays: 1:30 - 6:00 p.m. September 1 to November 1: Weekdays including Saturday: 10:30 am. - 7:30 p.m.; Sundays and holidays: 1:30 - 5:30 p.m.
November 2 to February 28: Weekdays and Saturdays: 10:30 am. - 6:30 p.m.; Sundays and holidays: 1:30 - 5:30 p.m

Admission price:
Euro 3,00 (no reductions)

Free admission to all persons born or resident in Siena, religious, Siena schools, elementary schools in the European Community, children under 11, persons with handicaps and one person accompanying them, authorized tour guides in Siena, journalists with official identification, one person accompanying a group.

Opening hours on holy days (as specified in the liturgical calendar:

- February 11 (Our Lady of Lourdes)
- Ash Wednesday
- Thursday, Friday, and Saturday before Palm Sunday (Eucharistic Triduum)
- Holy Week
- First Week of Eastertide
- The entire month of May (the month of Mary)
- June 21, 22, 23 (Triduum of Saint John the Baptist)
- SJune 24 (Feast Day of Saint John the Baptist)
- August 5-14 (Novena of the Assumption of Our Lady)
- September 8 (Birth of the Virgin Mary)
- November 1 (All Saints Day)
- November 2 (All Souls Day)
- November 18 (Feast Day of the Cathedral)
- November 28 to December 7 (Novena of the Immaculate Conception)
- December 31 (Day of Thanksgiving)

Mass times:
Weekdays including Saturday: 9:00 a.m., 10:00 a.m.
Sundays and holidays 8:00 a.m. - 11:00 a.m. - 12:15 a.m.