Along the road SS n°73 that from Siena leads to Roccastrada, a few kilometers after passing the village of Rosia, before the junction with the road SS. No. 541, is located, on the left of the road (coming from Siena) the Pia Bridge (Ponte della Pia).
The bridge, that with a single arch, crosses the river Rosia, was once one of the major steps on the path of the ancient road that connected Siena with Massa Marittima and the Metalliferous Hills (Colline Metallifere). The bridge probably dates to the early thirteenth century.
Passing the Pia Bridge, you arrive in a few minutes to the ruins of the ancient monastery of Santa Lucia, beyond the bridge there is an ancient pavement road, this road was probably rebuilt in 15th century and named “Strada Manliana”, the bridge could be built just for the passage of the monks of the Hermitage.
The bridge is also linked to a legend according to which, during the moonless nights, appears in the vicinity of this place, the ghost of a woman in white, with a veil covering her face, walking on the bridge without touching the ground. The name of the bridge is traditionally traced back to Pia de’ Tolomei and tradition equates the ghost of the woman with that of Pia de’ Tolomei.