THE HAGUE, NETHERLANDS - OCTOBER 11: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge visits the Mauritshuis to view the exhibition 'At Home in Holland: Vermeer and his Contemporaries from the British Royal Collection' on October 11, 2016 in The Hague, Netherlands. (Photo by Pool/Samir Hussein/WireImage)
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WireImage Pool/Samir Hussein

THE HAGUE, NETHERLANDS - OCTOBER 11: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge visits the Mauritshuis to view the exhibition 'At Home in Holland: Vermeer and his Contemporaries from the British Royal Collection' on October 11, 2016 in The Hague, Netherlands. (Photo by Pool/Samir Hussein/WireImage)
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WireImage Pool/Samir Hussein

THE HAGUE, NETHERLANDS - OCTOBER 11: Catherine, Duchess of Cambridge greets wellwishers after visiting the Mauritshuis to view the exhibition 'At Home in Holland: Vermeer and his Contemporaries from the British Royal Collection' on October 11, 2016 in The Hague, Netherlands. (Photo by Karwai Tang/WireImage)
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WireImage Karwai Tang

THE HAGUE, THE HAGUE - OCTOBER 11: Catherine, Duchess of Cambridge arrives at the Mauritshuis Gallery during a solo visit to the Hague on October 11, 2016 in the Hague, Netherlands (Photo by Chris Jackson/Getty Images)
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Chris Jackson Collection Chris Jackson

THE HAGUE, NETHERLANDS - OCTOBER 11: Catherine, Duchess of Cambridge arrives at the Mauritshuis to view the exhibition 'At Home in Holland: Vermeer and his Contemporaries from the British Royal Collection' on October 11, 2016 in The Hague, Netherlands. (Photo by Samir Hussein/WireImage)
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WireImage Samir Hussein