AMSTERDAM, NETHERLANDS - May 04: King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands at the liberation day concert on the Amstel River on May 04, 2019 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)
AMSTERDAM, NETHERLANDS - May 04: King Willem-Alexander of The Netherlands and Queen Maxima of The Netherlands at the liberation day concert on the Amstel River on May 04, 2019 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)