Princes flag Historical Dutch flag
The Prince’s Flag (Dutch: Prinsenvlag) is a Dutch flag, first used in the Dutch Revolt during the late 16th century.
The Prince’s Flag is based on the Flag of Prince William of Orange-Nassau, hence the name. The colours are orange, white and blue, which is in French orange-blanc-bleu. In Dutch this got roughly translated into the rhyme oranje-blanje-bleu (or even: ranje-blanje-bleu)