The coat of arms of Belgium bears a lion or, known as Leo Belgicus, as its charge. This is in accordance with article 193 of the Belgian Constitution: The Belgian nation takes red, yellow and black as colours, and as state coat of arms the Belgian lion with the motto UNITY MAKES STRENGTH. A royal decree of 17 March 1837 determines the achievement to be used in the greater and the lesser version, respectively.

"Unity makes strength" is a motto that has been used by various states and entities throughout history. It is used by Belgium, Bulgaria, Haiti, Malaysia and Georgia on their coats of arms and is the national motto of Belgium, Bolivia, Malaysia, Georgia and Bulgaria.