Poggio Civitella is the highest point in Montalcino, just south of the town on the road to Passo del Lume Spento, and a once-important Cappuccin convent. In Neolithic times Poggio Civitella took the form of a circular castle (Guelfo Magrini: 2003, p.32). 

‘Brunello di Montalcino’ by Guelfo Magrini (Morganti Editori, 2003), English edition.