Pro Fide, Lege et Rege () was an 18th century motto of the Polish-Lithuanian Commonwealth and then of Poland. It superseded the earlier Si Deus Nobiscum quis contra nos() and was featured on a variety of buildings, military decorations and equipment. It remains the motto of the Order of the White Eagle. The slogan of the order was that of the king's pro fide lege et grege (Latin: For Faith, Justice, and the Nation). The device of the cavaliers was pro fide et rege.