All eyes were on Princess Mary and Princess Mette-Marit this week when the Danish royal and her Norwegian counterpart joined forces at the 150th commemoration of the battle of Heligoland in Germany.
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Mary, 42, opted for a chic monochrome jacket and matching skirt, which she teamed with a black hat, while Mette-Marit, 40, wore a knee-length navy blue coat over a purple and white patterned dress.
Elsewhere Queen Maxima impressed royal fashion watchers when she stepped out in a striking scarlet dress and the Dutch royal family's glittering Mellerio Ruby Parure tiara while Princess Charlene of Monaco chose a neutral white and beige outfit as she and Prince Albert visited France's Cantal region.
Left to right: Queen Maxima of the Netherlands, Princess Mary of Denmark, Princess Charlene of Monaco and Princess Mette-Marit of Norway