Historical aerial photographs (HAPs) provide unique high-resolution records of past landscapes and are an important source for long-term administrative, environmental, archaeological, and spatial research. However, the large-scale transformation of national analogue archives into geometrically consistent geospatial datasets remains challenging because of heterogeneous image quality, incomplete metadata, and varying camera systems. This paper presents the georeferencing of 83,467 analogue aerial photographs covering Slovenia, acquired between 1953 and 2005. The archive was processed within 18 months, combining manual, semi-automatic, and automated procedures with systematic quality control. Preprocessing included image inspection, radiometric enhancement, fiducial mark extraction, frame masking, and preparation of camera calibration information, with the oldest imagery requiring the greatest manual intervention. Aerial triangulation was performed using a Structure from Motion-based workflow in Agisoft Metashape, supplemented by custom Python scripts. The resulting dataset comprises 45 annual orthophoto mosaics with a spatial resolution of 0.5 m. The resulting orthomosaics achieved accuracies (mean RMSE values) ranging from 1.46 to 3.26 m. The project demonstrates that large national archives of heterogeneous HAPs can be transformed into consistent, analysis-ready geospatial datasets. It also represents one of the few reported national-scale efforts to systematically georeference an archive of HAPs spanning more than five decades.