Grand-Duke Henri of Luxembourg and Grand-Duchess Maria Teresa of Luxembourg walk on the day of the funeral of former King of Greece Constantine II, in Athens, Greece, January 16, 2023. REUTERS/Louiza Vradi 

Grand-Duke Henri of Luxembourg and Grand-Duchess Maria Teresa of Luxembourg walk on the day of the funeral of former King of Greece Constantine II, in Athens, Greece, January 16, 2023. REUTERS/Louiza Vradi 

Grand-Duke Henri and Grand-Duchess Maria Teresa of Luxembourg attending the State Funeral of Queen Elizabeth II, held at Westminster Abbey, London. Picture date: Monday September 19, 2022. Gareth Fuller/Pool via REUTERS 

LONDON, ENGLAND - SEPTEMBER 19: Grand Duchess, Maria Teresa and Grand Duke, Henri of Luxembourg depart Westminster Abbey during the State Funeral of Queen Elizabeth II on September 19, 2022 in London, England. Elizabeth Alexandra Mary Windsor was born in Bruton Street, Mayfair, London on 21 April 1926. She married Prince Philip in 1947 and ascended the throne of the United Kingdom and Commonwealth on 6 February 1952 after the death of her Father, King George VI. Queen Elizabeth II died at Balmoral Castle in Scotland on September 8, 2022, and is succeeded by her eldest son, King Charles III. Gareth Cattermole/Pool via REUTERS 

Grand Duke of Luxembourg Henri and Grand Duchess Maria Teresa pay their respects to Britain's Queen Elizabeth, following her death, during her lying-in-state at Westminster Hall, in London, Britain, September 18, 2022. REUTERS/John Sibley/Pool 

Grand Duke of Luxembourg Henri and Grand Duchess Maria Teresa pay their respects to Britain's Queen Elizabeth, following her death, during her lying-in-state at Westminster Hall, in London, Britain, September 18, 2022. REUTERS/John Sibley/Pool 

Grand Duke of Luxembourg Henri and Grand Duchess Maria Teresa pay their respects to Britain's Queen Elizabeth, following her death, during her lying-in-state at Westminster Hall, in London, Britain, September 18, 2022. REUTERS/John Sibley/Pool 

Grand Duke of Luxembourg Henri and Grand Duchess Maria Teresa pay their respects to Britain's Queen Elizabeth, following her death, during her lying-in-state at Westminster Hall, in London, Britain, September 18, 2022. REUTERS/John Sibley/Pool 

Grand Duke of Luxembourg Henri and Grand Duchess Maria Teresa pay their respects to Britain's Queen Elizabeth, following her death, during her lying-in-state at Westminster Hall, in London, Britain, September 18, 2022. REUTERS/Sarah Meyssonnier/Pool 

Grand Duke of Luxembourg Henri and Grand Duchess Maria Teresa pay their respects to Britain's Queen Elizabeth, following her death, during her lying-in-state at Westminster Hall, in London, Britain, September 18, 2022. REUTERS/Sarah Meyssonnier/Pool 

British Union Jack flag and European Union flag are displayed by demonstrators next to the statue of Charlotte, Grand Duchess of Luxembourg, during the visit of British Prime Minister Boris Johnson in Luxembourg, September 16, 2019. REUTERS/Yves Herman 

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier 

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier 

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier 

Luxembourg's Grand Duchess Maria Teresa attends the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier 

Luxembourg's Grand Duchess Maria Teresa attends the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier 

Luxembourg's Grand Duchess Maria Teresa attends the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier 

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier 

Hereditary Grand Duchess Stephanie of Luxembourg listens to Archbishop Jean-Claude Hollerich at the reception at Grand Ducal Palace after the funeral of Grand Duke Jean in Luxembourg May 4, 2019. Sophie Margue/Pool via REUTERS 

Maria Teresa, Grand Duchess of Luxembourg chats at the reception at Grand Ducal Palace after the funeral of Grand Duke Jean in Luxembourg May 4, 2019. Sophie Margue/Pool via REUTERS 

Maria Teresa, Grand Duchess of Luxembourg chats at the reception at Grand Ducal Palace after the funeral of Grand Duke Jean in Luxembourg May 4, 2019. Sophie Margue/Pool via REUTERS 

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS 

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS 

Luxembourg's Hereditary Grand Duke Guillaume, Hereditary Grand Duchess Stephanie and Duke Guillaume leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS 

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of the family follow the hearse of Luxembourg's Grand Duke Jean as they leave Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family leave the Notre-Dame Cathedral following pallbearers carrying the coffin Luxembourg's Grand Duke Jean in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of the family follow the hearse of Luxembourg's Grand Duke Jean as they leave Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family leave the Notre-Dame Cathedral following pallbearers carrying the coffin Luxembourg's Grand Duke Jean in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa follow the hearse of Luxembourg's Grand Duke Jean as they leave Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Guy Wolff/Pool via REUTERS 

Luxembourg's Hereditary Grand Duke Guillaume and Hereditary Grand Duchess Stephanie follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family wait as pallbearers carry the coffin Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Pallbearers carry the coffin of Luxembourg's Grand Duke Jean while Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family pay respect at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Pallbearers carry the coffin of Luxembourg's Grand Duke Jean while Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family pay respect at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Luxembourg's Grand Duke Henri and Luxembourg's Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Pallbearers carry the coffin of Luxembourg's Grand Duke Jean while Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family pay respect at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir 

Henri, Grand Duke of Luxembourg, and his wife Maria Teresa, Grand Duchess of Luxembourg, leave after a commemoration ceremony for Armistice Day, 100 years after the end of World War One, at the Arc de Triomphe, in Paris, France, November 11, 2018. Ludovic Marin/Pool via REUTERS 

Tunisia's President Beji Caid Essebsi shakes hands with Henri, Grand Duke of Luxembourg, and his wife Maria Teresa, Grand Duchess of Luxembourg, as they leave after a commemoration ceremony for Armistice Day, 100 years after the end of World War One, at the Arc de Triomphe, in Paris, France, November 11, 2018. Ludovic Marin/Pool via REUTERS 

(L-R) German President Frank-Walter Steinmeier, King Philippe of Belgium, Grand Duke of Luxembourg Henri, Swiss President Alain Berset, Crown Prince Alois of Liechtenstein, Austrian President Alexander Van der Bellen, Elke Buedenbender, Queen Mathilde of Belgium, Grand Duchess Maria Teresa, Muriel Zeender Berset, Princess Sophie of Liechtenstein and Doris Schmidauer pose for a group picture during a meeting of German-speaking Presidents, in Sils Maria, Switzerland September 5, 2018. Peter Klaunzer/Pool via REUTERS 

Swiss President Alain Berset and his wife Muriel Zeender welcome Grand Duke Henri of Luxembourg and Grand Duchess MariaTeresa of Luxembourg prior to a meeting of German-speaking presidents in Sils Maria, Switzerland September 5, 2018. Peter Klaunzer/Pool via REUTERS 

Swiss President Alain Berset and his wife Muriel Zeender welcome Grand Duke Henri of Luxembourg and Grand Duchess MariaTeresa of Luxembourg prior to a meeting of German-speaking presidents in Sils Maria, Switzerland September 5, 2018. Peter Klaunzer/Pool via REUTERS 

Airbus Chief Executive Tom Enders, Grand Duke Henri of Luxembourg (R) and Grand Duchess Maria-Teresa of Luxembourg visit Airbus A380 final assembly line at Airbus headquarters in Blagnac near Toulouse, France, March 21, 2018. REUTERS/Regis Duvignau 

Grand Duke Henri of Luxembourg and Grand Duchess Maria-Teresa of Luxembourg attend a ceremony at the French Institute, after France's President Emmanuel Macron unveiled, before members of the French Academy and other guests, his strategy to promote French language as part of the International Francophonie Day, in Paris, France, March 20, 2018. Ludovic Marin/Pool via REUTERS 

France's President Emmanuel Macron, his wife Brigitte Macron, Grand Duke Henri of Luxembourg and Grand Duchess Maria-Teresa of Luxembourg attend a ceremony at the French Institute, after Macron unveiled, before members of the French Academy and other guests, his strategy to promote French language as part of the International Francophonie Day, in Paris, France, March 20, 2018. Ludovic Marin/Pool via REUTERS 

France's President Emmanuel Macron and his wife Brigitte Macron pose with Grand Duke Henri of Luxembourg and Grand Duchess Maria-Teresa of Luxembourg leave the French Institute, after Macron unveiled, before members of the French Academy and other guests, his strategy to promote French language as part of the International Francophonie Day, in Paris, France, March 20, 2018. Ludovic Marin/Pool via REUTERS 

French President Emmanuel Macron, his wife Brigitte Macron, Grand Duke of Luxembourg Henri and his wife Maria Teresa, Grand Duchess of Luxembourg, arrive to a State dinner held at the Elysee Palace in Paris, France March 19, 2018. REUTERS/Benoit Tessier/Pool 

French President Emmanuel Macron and Maria Teresa, Grand Duchess of Luxembourg, attend a state dinner held at the Elysee Palace in Paris, France March 19, 2018. REUTERS/Benoit Tessier/Pool 

French President Emmanuel Macron, his wife Brigitte Macron, Grand Duke of Luxembourg Henri and his wife Maria Teresa, Grand Duchess of Luxembourg, attend a State dinner held at the Elysee Palace in Paris, France March 19, 2018. REUTERS/Benoit Tessier/Pool 

French President Emmanuel Macron, his wife Brigitte Macron, Grand Duke of Luxembourg Henri and his wife Maria Teresa, Grand Duchess of Luxembourg, attend a State dinner held at the Elysee Palace in Paris, France March 19, 2018. REUTERS/Benoit Tessier/Pool 

Maria Teresa, Grand Duchess of Luxembourg, attends a State dinner held at the Elysee Palace in Paris, France March 19, 2018. REUTERS/Benoit Tessier/Pool