Dutch Royals and North Rhine-Westphalia's state premier Kraft tour 'Zeche Zollverein' in Essen
Queen Beatrix, Crown Princess Maxima and Crown Prince Willem Alexander of the Netherlands (2nd L-R) and North Rhine-Westphalia's state premier Hannelore Kraft (L) visit 'Zeche Zollverein', former coal mine in Essen April 15, 2011REUTERS/Volker Hartmann/Pool (GERMANY - Tags: ROYALS POLITICS)