I received a reply from Germany today. Prince Richard von Sayn-Wittgenstein-Berleburg passed away in March at age 82. I had written to his family, to express my condolences.
Prince Richard was married to Princess Benedikte of Denmark (Queen Margrethe's sister). So, he was both an extended member of the Denmark Royal Family, as well as the head of Royal Family of the former monarchy of Sayn-Wittgenstein-Berleburg.
This is the first reply I have gotten from a former monarchy. Although I will file it under Denmark in my collection.
The envelope features a picture of the Castle of Berleburg, which is the family's residence. Prince Richard passed away at the castle, and his funeral was held at the castle church.
The reply is a lovely tri-fold card.
The front of the card features a lovely picture of Richard. The picture was taken in the forest near the family home.
The back of the card features Prince Richard's coat of arms, date of birth & death, and his full name:
Richard Casimir Karl August Robert Konstantin
Prince von Sayn-Wittgenstein-Berleburg,
6th ruler of Sayn-Wittgenstein-Berleburg,
Count of Sayn, Lord of Homburg, Vallendar,
Neumagen and Neuenhemsbach
29th October 1934 - 13th March 2017
The inside has a message from his wife and children in 3 languages: English, German and Danish.
The message reads:
Your comforting words, the beautifal wreaths and flowers have touched and supported us greately in our [grief] over my husband's and or father's passing. We thank you wholeheartedly for your warm sympathy.