"Post-mortem photography (also known as memorial portraiture or a mourning portrait) is the practice of photographing the recently deceased. Various cultures use and have used this ...
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practice, though the best-studied area of post-mortem photography is that of Europe and America. There can be considerable dispute as to whether individual early photographs actually show a dead person or not, often sharpened by commercial considerations.
The form continued the tradition of earlier painted mourning portraits. Today post-mortem photography is most common in the contexts of police and pathology work." - (en.wikipedia.org 27.02.2021)