Santa Cristina in Caio: La lunga durata di un insediamento pubblico viario tra eta romana e medioevo collects the results of the 2009-2015 excavation campaigns in Santa Cristina in Caio (Buonconvento, Siena) and contextualises the site in the wider phenomenon of mansiones, Roman secondary settlements, and their reuse between Late Antiquity and the Early Middle Ages. In particular, it explores the transformation of the Tuscan countryside at the end of the Roman landscape and the legacy of the public estate in the longue duree between the Roman and Carolingian empires.