Stay in the heart of Siena – Excellent location – show map Il Battistero Siena is located in Siena's Piazza San Giovanni, just opposite the Battistero di San Giovanni. It offers air-conditioned rooms and suites with free WiFi overlooking Siena Cathedral. Rooms at the Battistero come with a flat-screen TV and a hairdryer in the private bathroom. Piazza del Campo is 450 feet from the property. Siena Train Station is 1.2 mi away.