In the field of cultural heritage, various data describe the state of the monument (survey data and scientific imaging, mappings of degradations, photographic collections, historical archives, analysis documents, coring, etc.). For the difficulty to collect, compare, analyze and validate data prior to restoration, this project aims to mobilize various disciplines (architecture, conservation, mechanics, informatics) to define a prototype of chain for the processing of information (including metrics and spatial analysis of surfaces, geometric models of structures, heterogeneous documentary sources, etc.). The objective is to design and develop an open and extensible software platform for the capitalization and the management of knowledge that enhances the comprehension and analysis of degradation phenomena affecting historic buildings. This project belongs to a highly multidisciplinary approach, and aims to support, in a rational way, the set of technical features (leaning on the "technological blocks" already developed by the consortium partners). Moreover, it aims to integrate them within a methodological reflection related to scientific questions raised by real objects of study. In terms of computational modeling, this project presents two innovative aspects: on one side, the idea of ??linking (and of bringing near) the phase of acquisition of spatial data to the one of data analysis and interpretation, on the other side, the ambition to develop analysis supports (morphology of the building, surface state, structural behavior) interconnected in a system conceived for the semantic characterization, based on mechanisms of distribution / spread (multiscale and multi-projection) of concepts structured according to an ontology specific to cultural heritage domain.