The 435-year-old coin, discovered in western-most Canada, has rekindled a theory that a British explorer made a secret voyage here two centuries before it was discovered by Spanish sailors.

A little after noon on Tuesday, June 18, Brazilian artist Ilê Sartuzi entered Room 68 of the British Museum and secretly replaced a silver coin minted during the English Civil War with a replica.

A rare gold coin depicting a portrait of Oliver Cromwell has sold for a world record £471,200 at auction. The 50 shilling piece, dating back to 1656, is one of only 12 in existence, auctioneers ...