In 1908 Queen Wilhelmina adopted a flag called the royal standard.
History of the royal standard
The royal standard has been flown by Queen Wilhelmina, Queen Juliana and Queen Beatrix. Since ascending the throne in 2013, King Willem-Alexander has used a modified version of the standard: the rosette in the ribbon of the Military Order of William has been replaced by a bow. The standard is flown above the King’s home and above Noordeinde Palace when he is in the Netherlands.
Appearance of the royal standard
The royal standard is an orange flag bearing the coat of arms of the Kingdom surmounted by a crown and surrounded by the insignia of the Grand Cross of the Military Order of William. The flag is divided into four quarters by a cross of Nassau blue. In each quarter is a blue bugle-horn, taken from the arms of the principality of Orange.