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Symbols whose documented meanings include protection, warding-off harm, or safeguarding — drawn from religious, medical and hazard-warning traditions that are otherwise unrelated to one another.
An ancient Egyptian hieroglyphic sign shaped like a cross with a looped top, signifying life.
A staff with a single serpent coiled around it, associated in Greek mythology with Asclepius, the god of medicine.
A trefoil of overlapping circles, designed to be instantly recognisable as a warning for biological hazards.
A three-bladed trefoil, conventionally black on a yellow background, warning of ionising radiation hazards.
An open right-hand palm, often with an eye motif, used across Jewish, Muslim, Christian and secular Middle Eastern/North African traditions as a protective symbol.