The conservation of architectural heritage usually requires a multidisciplinary
approach involving a variety of specialist expertise and techniques. Nevertheless, destructive
techniques should be avoided, wherever possible, in order to preserve the integrity of the
historical buildings, therefore the development of non-destructive and non-contact
techniques is extremely important. In this framework, a methodology for combining the
terrestrial laser scanning and the infrared thermal images is proposed, in order to obtain a
reconnaissance of the conservation state of a historical building. The proposed case study is
represented by St. Augustine Monumental Compound, located in the historical centre of the
town of Cosenza (Calabria, South Italy). Adopting the proposed methodology, the paper
illustrates the main results obtained for the building test overlaying and comparing the
collected data with both techniques, in order to outline the capabilities both to detect the
anomalies and to improve the knowledge on health state of the masonry building. The 3D
model, also, allows to provide a reference model, laying the groundwork for implementation
of a monitoring multisensor system based on the use of non-destructive techniques.