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. On the basis of the French names of these colours, orange-blanc-bleu, the flag is also referred to by the Dutch rhymes oranje-blanje-bleu and ranje-blanje-bleu.

This flag is controversial in the Netherlands due to its usage in the past by the NSB. The flag is now mostly used in the Netherlands by far right activists and in historical re-enactment in equivalence to the usage of the Confederate battle flag in the United States. Wikipedia