In heraldry the unicorn is best known as a symbol of Scotland: the unicorn was believed to be the natural enemy of the lion – a symbol that the English royals had adopted around a hundred years before Two unicorns supported the royal arms of the King of Scots, and since the 1707 union of England and Scotland, the royal arms of the United Kingdom have been supported by a unicorn along with an English lion. Two versions of the royal arms exist: that used in Scotland gives more emphasis to the Scottish elements, placing the unicorn on the left and giving it a crown, whereas the version used in England and elsewhere gives the English elements more prominence.