The Frinco Castle: From an Integrated Survey to 3D Modelling and a Stratigraphic Analysis for Helping Knowledge and Reconstruction

The Frinco Castle (AT-Italy) was the focus of a critical requalification and restoration project and historical knowledge. The initial medieval nucleus was modified and enriched by other architec-tural parts giving the current shape over the centuries. These additions gave the castle its actual internal and external complexity and an extreme structural fragility: In 2014, a significant portion collapsed. The main objective of this work was to obtain 3D metric documentation and historical interpretation of the castle for reconstruction and fruition purposes. The local administration has planned knowledge processes from 2021: an integrated 3D geodetic survey of the entire castle and stratigraphic investigations of masonries. Both surveys were essential for understanding the ar-chitectural composition as well as the historical evolution of the court. NURBS modelling and stratigraphic analysis of masonries allowed the implementation of 3D immersion related to the historical interpretation. Furthermore, this modelling choice was essential for virtually recon-structing the collapsed area and helping the restoration phase.