Since 1975, the Piagnaro Castle has been host to the Museum of the Stele Staues of Lunigiana dedicated to Augusto Cesare Ambrosi. The Stele Statues are enigmatic stone sculptures dated between 4 and 1 thousand a.d. and represent the most important collection of sculpture from prehistoric Europe. The sandstone sculptures are characterized by their head in the shape of the italian policeman's hat and face in the form of a “U”. They demonstrate human figures, both male and female, accompanied by a complex exhibition of arms and ornaments typical of the Copper Age and Iron Age. The statues are classified in three typological groups (A, B and C) and are exhibited in darkened rooms, lit by spotlights which illumine the anatomical traits and details, creating a compelling atmosphere.