Among the royal contingent paying their respects in Poland were the King and Queen of the Netherlands and the King and Queen of the Belgians. Willem-Alexander wore a kippah (yarmulke), which was a touching gesture.
The Crown Princes of Denmark and Norway were also in attendance, as was the Crown Princess of Sweden and the Hereditary Grand Duke and Grand Duchess of Luxembourg.
Below, Guillaume and Stéphanie laid a wreath at the camp.
Holocaust memorial events were also held around the world, some drawing royal attendance.
The Prince of Wales and Duchess of Cornwall attended a memorial in London, and Crown Princess Mette-Marit joined in the events in Oslo.
Many others not shown here also participated in various events at home, including the King and Queen of Sweden, Prince Daniel, and the King of Spain. The attendance of this particular set of people is not the point of these events, of course, but I can't help but find it lovely to see so many in our frame of reference united, from whatever location, to commemorate and to remember this important moment in history.
If you would like to watch the entire ceremony from Auschwitz, you may do so below.
Photos: Getty Images as indicated