PERTH, AUSTRALIA - OCTOBER 31: King Willem-Alexander and Queen Maxima of the Netherlands greet well wishers at Victoria Quay on October 31, 2016 in Fremantle, Australia. The Dutch King and Queen are in Perth to o commemorate the 400th anniversary of the landing of Dutch explorer Dirk Hartog in Western Australia. (Photo by Paul Kane/Getty Images)
PERTH, AUSTRALIA - OCTOBER 31: King Willem-Alexander and Queen Maxima of the Netherlands visit the Batavia Gallery with Museum director Diana Jones and Curator Michael McCarthy at the Shipwreck Galleries on October 31, 2016 in Fremantle, Australia. The Dutch King and Queen are in Perth to commemorate the 400th anniversary of the landing of Dutch explorer Dirk Hartog in Western Australia. (Photo by Paul Kane/Getty Images)
PERTH, AUSTRALIA - OCTOBER 31: Historian Mike Lefroy talks with King Willem-Alexander and Queen Maxima of the Netherlands at Victoria Quay on October 31, 2016 in Fremantle, Australia. The Dutch King and Queen are in Perth to commemorate the 400th anniversary of the landing of Dutch explorer Dirk Hartog in Western Australia. (Photo by Paul Kane/Getty Images)
PERTH, AUSTRALIA - OCTOBER 31: King Willem-Alexander and Queen Maxima of the Netherlands greet well wishers at Victoria Quay on October 31, 2016 in Fremantle, Australia. The Dutch King and Queen are in Perth to commemorate the 400th anniversary of the landing of Dutch explorer Dirk Hartog in Western Australia. (Photo by Paul Kane/Getty Images)
