Provides a general view of the different applications of photogrammetric measurements or images for the documentation and conservation of cultural heritage. The author discusses the principles of perspective and stereoscopy (natural and artificial) that lie behind photogrammetric measurements. The different kinds of instruments used for these measurements are also described and illustrated in the article. The instrumentation ranges from simple photogrammetric cameras, to terrestrial photogrammetric cameras as well as metric and semi-metric cameras. The article also discusses the procedures and instrumentation used in the post-processing phase of the information.