The Royal Mint is one of the world's leading mints, with the largest and most technically advanced minting facility across the globe; it is also the United Kingdom's oldest company. As well as producing all the coins of the United Kingdom it has been trusted with developing currency for more than 30 countries around the world, making it the world's leading export mint.

Numismatists dream of finding and owning extremely rare (and, therefore, valuable) coins. Few, of course, will achieve that dream… Here we look at five of the rarest coins known to man.

Numismatics is “the study of the physical embodiment of various payment media” (i.e. currencies).