Symbols with documented historical use.
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 winged staff with two serpents wound around it, originally the attribute of Hermes (Mercury), the messenger god.
An ancient hooked-cross symbol with a long history as a sign of good fortune across many cultures, and a separate, more recent history as the central emblem of Nazi Germany.
A black skull and crossbones in a red-bordered diamond, the GHS symbol for acute toxicity.
A capital letter A, its legs extending slightly past a surrounding circle, used internationally as a symbol of anarchism.
A circle with an arrow pointing up and right — Mars, the male sign, and iron.
A circle above a cross — Venus, the female sign, and copper.
A circle with a dot at its centre — the Sun, and gold in alchemy.
A crescent — the Moon, and silver in alchemy.
A horned circle above a cross — Mercury, and quicksilver.
A stylised numeral four or Greek zeta crossed by a bar — Jupiter, and tin.
A crossed sickle shape — Saturn, and lead.
A circle quartered by a cross — the Earth.
A circle with a vertical stroke rising to a cross — Uranus.
A trident — Neptune.
A rounded cloud outline, standing for a remote service or remote storage.
A blue figure with outstretched arms inside a ring of laurel, Germany's environmental label.
A star-like figure of radiating points marking the cardinal directions on a map or chart.
A small triangle with a central dot, marking a surveyed height and position.
An italic lower-case c, denoting the speed of light in vacuum.
A hexagon with an inscribed circle, representing delocalised aromatic bonding.