This article publishes a study of monumental false-door from an Old Kingdom mastaba, carried out in 2015. The objectives were to certify the authenticity of the false-door, to establish its probable date of manufacture, and to establish its possible archaeological provenance. Although in a poor state of preservation, the false-door is of special interest due to the atypical scenes represented on its left inner jamb, where priests are shown performing a series of rites. Photographic documentation of the false-door was subjected to digital laboratory processing to optimize images so that the iconographic and textual details could be appreciated and evaluated more easily. The study concludes with the identification of the owner of the false-door, by tracing its original installation location to a mastaba on the Giza Plateau, and by dating it to the late fifth dynasty.