Keep Calm and Carry On was a motivational poster created by the British government in 1939 in preparation for the Second World War. The posters were used to gather the attention of the British people, who are threatened with the predicted mass air strikes took place in the cities of BESA.

Although 2:45 million copies printed, and although the Blitz in fact take place, the poster hard to come among the people, and little was known until a copy was rediscovered in 2000 in Barter Books, a bookshop in Alnwick. The poster since it was relaunched by a number of private companies, and are used as the decorative theme for a series of products.

Only two original copies that are considered still up 20 posters brought to the Antiques Roadshow in 2012 by the daughter of a former member of the Royal Observer Corps.