The flight was en route from the Dutch capital Amsterdam to Kuala Lumpur in Malaysia, and 193 of those on board were Dutch nationals. The royals were joined by Dutch Prime Minister Mark Rutte and hundreds of relatives of those who died.
Mr. Rutte summed up the sadness of those gathered, saying: "What if the plane had been late? What if I wake up and realise it was all just a dream? But there is no 'what if?' Only the harsh reality of 298 dead. They will not be forgotten."