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This contribution describes the results of an International workshop on documentation of historic and cultural heritage developed jointly between Universidad de Guadalajara’s Centro Universitario de Arte, Arquitectura y Diseño (CUAAD) and Carleton University’s Architectural Conservation and Sustainability Program. The objective of the workshop was to create a learning environment for emerging heritage professionals through the use of advanced recording techniques for the documentation of modern architectural heritage in Guadalajara, Mexico. The selected site was Casa Cristo, one of the several architectural projects by Luis Barragán in Guadalajara. The house was built between 1927 and 1929 for Gustavo R. Cristo, mayor of the city. The style of the building reflects the European influences derived from the architect’s travel experience, as well as the close connection with local craftsmanship. All of these make the house an outstanding example of modern regional architecture. A systematic documentation strategy was developed for the site, using different survey equipment and techniques to capture the shape, colour, spatial configuration, and current conditions of Casa Cristo for its eventual rehabilitation and conservation.

The author presents three lines of investigation, developed in the University of Siena by the study of some hundreds of historical buildings. The study of depositional processes and products allows us to interpret the dynamics of depositional environments and to establish a chronological framework.This time framework is provided by different aspects of stratigraphy and allows us to interpret building activities in terms of dynamic evolving environments. The record of buildings activities and climatic-pollution processes through historical time is held in these walls along with evidence of the different lime mortars. Our aim is to calibrate the “tools” that could be used to connect the analysis of lime mortar to building activities. Lime mortars could be considered as a perfect dating material for the historical building activities, because it must be freshly prepared every time you need it (it couldn’t be reused), even for the smallest intervention. With the help of a computer we will obtain a rectified photography as simulation where a virtual model works as a mathematics formula. So that we would say that, with the virtual reality,we can either “rebuild” an outline of a building in a precise moment of its history, or we can examine and study all the theories related with the analysis of the material structure, and, eventually,we might understand either the theories will be right or not. L’autore presenta tre delle linee di ricerca sviluppate dal Laboratorio senese, risultato della prassi operativa su alcune centinaia di edifici. La prima è una riflessione sulla complessità del processo di formazione del deposito stratificato, sulle strategie da seguire nell’esecuzione dell’indagine e sulla necessità di un ‘progetto conoscitivo’ preliminare all’indagine stessa. La seconda linea di ricerca affronta lo studio delle malte. L’obiettivo è quello di calibrare gli strumenti che possono essere impiegati per ricorrere all’analisi delle malte nell’identificazione delle attività edilizie. Le malte possono considerarsi come il perfetto fossile guida per le attività dell’edilizia storica, poiché devono essere preparate al momento del loro utilizzo (non possono essere reimpiegate), anche per i più piccoli interventi. L’ultima parte del contributo tratta della fotografia rettificata, grazie alla quale è possibile simulare un modello virtuale dell’edificio, “ricostruendolo” nelle sue varie fasi costruttive, e attraverso il quale studiare e verificare tutte le operazioni di analisi della struttura materiale.

International audience; The techniques applied to the architectural studies are constantly developed and enhanced. According to the context, the archaeologist can choose from among technical tools based on photogrammetry, lasergrammetry or even technical drawing. Nowadays, the complete survey of a building is easier and faster than ever. Nevertheless, the possibility to capture reality "as-built" leads to the production of more "objective" documents than before. Indeed, architectural survey can be traditionally defined as a method to identify and gather information about historic architectural resources. Usually, the drawing consists to select information which must be recorded. How are applied the different techniques in the case of architectural studies? What are their interactions? Some answers can be finding in a recent work: the study of the antique Opet temple at Karnak. The analysis of the monument has requested a complete and accurate survey. Various techniques and tools have been employed: 3d scanner, digital photographic rectification, drawings... Throw this experience it's possible to give a critical point of view of their application in the field of archaeology.; Les techniques appliquées au relevé dans le domaine des études architecturales, ne cessent de se perfectionner. L'archéologue du bâti dispose de nos jours des moyens variés que sont la photogrammétrie, la lasergrammétrie, et tout autant le dessin traditionnel. La capacité à produire plus rapidement une documentation extrêmement précise, implique néanmoins quelques changements en termes de méthodologie. Les nouvelles techniques de relevé tendent à produire des images plus fidèles au sujet -que l'on pourra penser plus "objectives"- mais pourraient s'éloigner de leur vocation analytique initiale : si le dessin manuel organisait les données tout en les enregistrant, l'automatisation partielle des technologies ne permet pas d'opérer cette sélection première de l'information. Il est par conséquent intéressant de se questionner sur leur pertinence, en fonction des contextes et des programmes. L'étude architecturale menée sur le temple ptolémaïque d'Opet à Karnak en Haute-Égypte a permis d'apporter quelques réflexions sur le sujet. Le relevé complet du monument a mis en œuvre différentes techniques telles que le scannage 3d ou le redressement de photographies. Leur utilisation sur ce chantier archéologique contribue à dresser une réflexion critique sur leur utilisation et leur efficacité.