Throughout most of the history of Poland, the banner of Poland was one of the main symbols of the Polish State, normally reserved for use by the head of state. Although its design changed with time, it was generally a heraldic banner, i.e., one based directly on the national coat of arms: a crowned White Eagle on a red field (Gules an eagle Argent crowned Or). The banner should not be confused with the flag of Poland, a white and red horizontal bicolor, officially adopted in 1919.
Derived from early flag-like objects, the Polish royal banner of arms dates as far back as the 11th century. A symbol of royal authority, it was used at coronations and in battles. In the interwar period, it was replaced with the Banner of the Republic of Poland, which was part of the presidential insignia. A national banner is not mentioned in the current (2007) regulations on Polish national symbols, although today's presidential jack is based directly on the pre-war design for the Banner of the Republic.