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The document presented intends to propose an experience of architectural survey and representation, relating to the Underground Church of Sotterra in Paola (CS). In a first part, the main historical and interpretative problems relating to the building investigated are illustrated; a literary review relating to studies conducted on the church is presented. In the second part the process that leads from the real object to representations of the object itself in virtual space, such as point cloud, TIN mesh, textured mesh, is described. The virtual object is then brought back into the 'real' space through the use of a 3D printer, albeit in the form of a model and as a reduced cast of the real space. The model produced is constituted as a 1:100 scale cast of the negative architectural space, a space that is the result of the sum between the original spatial configuration and the modifications made at the end of the 19th century, in the context of the rediscovery of the building. The documents produced offer the possibility of understanding and highlighting the results of these modifications, in reference to an interesting underground space dedicated to Christian worship. The work presented here constitutes an intermediate and synthetic stage, in reference to a study still in progress.