Leaving Arezzo behind, head down regional road 71 until Pieve a Socana, in the municipality of Castel Focognano, in the Casentino, a few kilometres from the right bank of the Arno. In the apse of the Romanesque Parish Church of S. Antonino, there is a large Etruscan altar that was primarily used from the 5th to 1st century BCE. The site is located at the crossroads between two probable routes towards the Casentino, one coming from Arezzo and another from the Lower Valdarno.
Archeological digs carried out a few decades ago brought to light a staircase that would have once led to the temple that was oriented in the opposite direction of the church. The site is a clear testament to Etruscan faith, which was closely tied to other places of worship in the valley, like the one on Monte Falterona and its votive offerings, deep in the Casentino.