Royal response from His Royal Highness The Duke of Brabant on the occasion of his 50th birthday.
Born Dutch: Filip Leopold Lodewijk Maria, French: Philippe Léopold Louis Marie, German: Philipp Leopold Ludwig Maria on 15th April 1960 in Belvédère Castle in Laeken north of Brussels.
The reply is in the form of a picture which has a message in Dutch on it.
Picture
Translation
His Royal Highness Prince Philippe would like to thank you for the wonderful wishes for his 50th birthday.
RoyalResponses 
One comment