Variaciones de fachadas en iglesias huanuqueñas: San Cristóbal, La Merced y Señor de Puelles

San Cristóbal, La Merced and Señor de Puelles are churches located in the district of Huanuco (Peru). The problem lies in the morphological transformation of these heritage buildings over time, which affects their authenticity and conservation. The main objective was to identify and describe the morphological variations of the facades between 1940 and 2024, in order to generate a comparative architectural record that contribute to their conservation and serve as a reference for possiblefuture losses or interventions. This is a descriptive-comparative qualitative research. The population consisted of the three selected churches and a purposive sample was used. Techniques such as observation, interviews, photogrammetry and sketch record cards were used. The Choisy method was applied for the analysis and AutoCAD and SketchUp software was used. The results evidence significant transformations in each façade, mainly in formal, stylistic and material aspects. The San Cristóbal church presented a more noticeable evolution in its morphology, while the La Merced church preserved greater stability in its composition. The research concludes that digitalization by means of photogrammetry and modeling in specialized software is essential for the documentation, conservation and possible restoration of the heritage facades in the district of Huánuco.