ABSTRACT
Databases, geographic information systems (GIS) and virtual reconstructions are becoming an essential part of research in urban history. Digital technologies, such as interactive visual and multimedia displays, are also becoming important for publication and presentation. The Renaissance transformation of the medieval church introduced classical components through the addition of Corinthian pilasters applied to the nave piers and other classical elements to the upper walls. The profound nature of the changes made by Grappiglia at San Pietro make it difficult to reconstruct the original appearance of the Romanesque church. The combination of historical views and the few remaining original fragments of wall have permitted people to reconstruct the Romanesque church as it appeared prior to its demolition. The creation of a model was even more useful in examining the form of the presbytery above the crypt. Thanks to the digital reconstruction of the shape of the chancel, it was possible to better understand the functions of this part of the church.
