The Sanctuary of Saint Catherine (Santuario di Santa Caterina) is a small religious complex built around the family home of Caterina Benincasa, Siena’s medieval mystic and writer. Tucked into the Fontebranda quarter below the Basilica of San Domenico, its chapels, oratories and loggia offer a quieter, more personal encounter with the city than its monumental churches.
Born in 1347 to a dyer’s family, Catherine became an influential voice in church and political affairs. She corresponded with rulers and clergy and urged Pope Gregory XI to return the papacy from Avignon to Rome. Canonised in 1461, she was later named a patron saint of Italy, a Doctor of the Church and a co-patron of Europe.
Inside the sanctuary, rooms associated with her life include the cell where she is traditionally believed to have prayed and an oratory on the site of the family kitchen. Paintings and frescoes reflect centuries of devotion, while the courtyard and loggia reveal glimpses of the steep Sienese streets. Combine your visit with nearby Fontebranda, the historic fountain, and the Basilica of San Domenico, where relics of Catherine are kept.
The sanctuary is roughly a ten-minute walk downhill from Piazza del Campo, with a steady climb on the return, so comfortable shoes are useful. Dress modestly and keep voices low in the chapels. Check current opening hours before visiting, especially around services and holidays; Saint Catherine’s feast day on 29 April can be atmospheric but busier.