Hidden for 175 years: Photographer's mysterious "witch mirror" 3D self-portrait emerges

In 1847, French photography pioneer Charles Nègre created a 3D self-portrait using a 'witch's mirror' — a clever piece of 19th-century surveillance technology. These convex mirrors, popular in homes and businesses since the 1500s, let owners monitor entire rooms from a single vantage point without turning their heads. — Read the rest
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