Modern remote sensing technologies offer a range of solutions for creating various types of architectural heritage objects measurement models. Image processing algorithms allow not only to digitally recreate existing buildings, but also to make virtual reconstruction of partially destroyed architectural heritage. Photogrammetry is a relatively inexpensive and practically universal method for modelling architectural objects and creating their measurement drawings. The appearance of unmanned aerial vehicles with digital cameras on board in the photogrammetrist’s arsenal has greatly facilitated the process of photographing hard-to-reach, and even more valuable architectural objects. Nevertheless, in order to obtain the desired result, individual techniques, both for imaging and digital reconstruction, must be selected for each object. The study presents the work results on two partially destroyed architectural heritage. A complex survey of the interior and exterior was carried out to digitally reconstruct the lost elements and to create dimensional models. The first architectural object, the ruins of the 17th century Adu-Surkho castle, is located in the Chechen Republic. Its modelling was based on images obtained only from the UAV, and the reconstruction of lost parts was based on analogy with existing examples of historical buildings. The second object, the 18th century Stroganovs’ salt barn, is the oldest brick structure of Tutaev (Romanovskaya side). The modern state model was built based on the results of ground and aerial survey, and the reconstruction of the lost elements based on a set of multi-temporal images and drawings of the XVIII century. The results of the digital reconstruction will be used for restoration projects to restore the original appearance of the structures and increase the significance of these objects in the cultural and tourist activities of the regions.
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