Marriage and family | In memoriam | Royal House of the Netherlands https://www.royal-house.nl/members-royal-house/in-memoriam/prince-claus/marriage-and-family
On 28 June 1965 the engagement was announced of Claus von Amsberg and Princess Beatrix, after a report drawn up by Professor Louis de Jong at the government’s request had concluded that there were no concerns about his conduct during the Second World War. In autumn of the same year a bill consenting to the marriage was passed by the Lower and Upper Houses of Parliament. On 10 December 1965 Claus von Amsberg became a Dutch citizen.
Kater, with a sermon by Rev. J.H. Sillevis Smitt.