Castello di Celsa is a historic castle estate located in the countryside just outside Siena. The property dates back to the 13th century and combines medieval architecture with later Renaissance additions. The estate is surrounded by landscaped gardens, woodland and open parkland, creating a secluded setting for private events.

Weddings typically use several areas of the property. Ceremonies can take place in the gardens, the courtyard or in the small chapel beneath the castle tower. Cocktail hour is often hosted in the park or Italian garden, while receptions and seated dinners are commonly arranged in the restored Granary building, which includes indoor halls and a loggia terrace overlooking the countryside.

The venue operates mainly on an exclusive-use basis and includes limited on-site accommodation, allowing couples to host multi-day celebrations while keeping the property private for their guests.