It is also a question about titles for possible children of them. Maybe they will be HRH Prince/ss XXX of the Netherlands, Prince/ss of Oranje-Nassau, Prince/ss of Bulgaria. After the marriage of Juliana and Bernhard their children were also Princesses of Lippe-Biesterfeld.
Today is also a big day for King Carl XVI Gustaf as he became the longest serving monarch in Europe.
https://en.wikipedia.org/wiki/List_of_current_reigning_monarchs_by_length_of_reign
Congratulations from Norway:
https://www.kongehuset.no/nyhet.html?tid=224878&sek=26939
From the Netherlands:
https://www.instagram.com/p/C2FYjnitlDO"
From Sweden:
https://www.instagram.com/p/C2FUg0VqGyo/"]
From Romania:
https://www.instagram.com/p/C2FVgj1qAAJ/"]