Peace symbol

The British designer Gerald Holtom drew this symbol in 1958 for the Easter march to Aldermaston, the site of Britain’s Atomic Weapons Research Establishment, which set out from London. Inside a circle it overlays the positions of the semaphore flags for the letters N and D, standing for nuclear disarmament, and it was soon taken up as the badge of the Campaign for Nuclear Disarmament.

Holtom never copyrighted it, so it travelled freely and became a sign for peace in general.