There are numerous synonyms for the term "royal arms." These include "coat of arms," "crest," "heraldry," and "emblem," among others. The use of such symbols has a long history, dating back to medieval times when knights would display their personal heraldry on their shields and surcoats. The concept of a national coat of arms emerged later, representing the monarchy and the countries they ruled. The royal arms of the United Kingdom, for example, feature a lion, a unicorn, and various other symbols representing the different regions of the country. The use of such symbols remains an important part of heraldry and national identity today.