Documents of Jean-Baptiste Bernadotte aka Charles XIV John of Sweden are displayed during the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

The coat of arms of the Kingdom of Sweden are offered to Mayor of Pau, Francois Bayrou during the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Queen Silvia attends the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Prince Daniel attends the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Crown Princess Victoria attends the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Crown Princess Victoria attends the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's King Carl XVI Gustaf attends the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's King Carl XVI Gustaf attends the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Crown Princess Victoria and Prince Daniel sign the visitors' book during the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's King Carl XVI Gustaf, Queen Silvia sign the visitors' book during the inauguration of the Bernadotte Museum, after renovations, as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's King Carl XVI Gustaf, Queen Silvia sign the visitors' book during the inauguration of the Bernadotte Museum, after renovations, as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's King Carl XVI Gustaf, Queen Silvia, Sweden's Crown Princess Victoria and Prince Daniel attend the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Crown Princess Victoria and Prince Daniel attend the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Crown Princess Victoria and Prince Daniel attend the inauguration of the Bernadotte Museum as part of a visit to mark the Bicentenary of Bernadotte on the Swedish throne in Pau, France, October 8, 2018. Caroline Blumberg/Pool via REUTERS

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's King Carl XVI Gustaf arrives at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's King Carl XVI Gustaf and Queen Silvia arrive with Francois Bayrou, mayor of Pau, at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia pose in front of the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia pose with Francois Bayrou, mayor of Pau, in front of the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's Queen Silvia pose in front of the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Queen Silvia arrives with Francois Bayrou, mayor of Pau, at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Queen Silvia arrives with Francois Bayrou, mayor of Pau, at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's King Carl XVI Gustaf and Queen Silvia arrive with Francois Bayrou, mayor of Pau, at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Queen Silvia, Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia, Francois Bayrou, mayor of Pau, arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia, Francois Bayrou, mayor of Pau, arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia pose with Francois Bayrou, mayor of Pau, in front of the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia pose in front of the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia pose with Francois Bayrou, mayor of Pau, in front of the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's Queen Silvia arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel, Sweden's King Carl XVI Gustaf and Queen Silvia arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Sweden's Crown Princess Victoria and Prince Daniel arrive at the Bernadotte Museum as part of a visit for the bicentenary of the Swedish throne in Pau, France, October 8, 2018. REUTERS/Regis Duvignau

Council President Countess Bettina Bernadotte gives a speech during Lindau Nobel Laureate Meetings in Lindau, Germany August 23, 2017. REUTERS/Arnd Wiegmann

European Central Bank (ECB) President Mario Draghi smiles as Countess Bettina Bernadotte, Council President of the Lindau Nobel Laureate Meetings stands beside him in Lindau, Germany August 23, 2017. REUTERS/Arnd Wiegmann

Queen Silvia of Sweden smiles before an official dinner at the Charlottenburg Palace in Berlin, Germany, October 6, 2016. REUTERS/Maja Hitij/Pool

Queen Silvia of Sweden talks to German president Joachim Gauck's partner Daniela Schadt before an official dinner at the Charlottenburg Palace in Berlin, Germany, October 6, 2016. REUTERS/Maja Hitij/Pool

Queen Silvia and King Carl XVI Gustaf of Sweden accompanied by German president Joachim Gauck and his partner Daniela Schadt arrive for an official dinner at the Charlottenburg Palace in Berlin, Germany, October 6, 2016. REUTERS/Maja Hitij/Pool

Queen Silvia and King Carl XVI Gustaf of Sweden accompanied by German president Joachim Gauck and his partner Daniela Schadt pose ahead of an official dinner at the Charlottenburg Palace in Berlin, Germany, October 6, 2016. REUTERS/Maja Hitij/Pool

Queen Silvia and King Carl XVI Gustaf of Sweden visit the site of the Humboldt Forum in Berlin, Germany, October 5, 2016. REUTERS/John Macdougall/Pool

Queen Silvia and King Carl XVI Gustaf of Sweden visit the site of the Humboldt Forum in Berlin, Germany, October 5, 2016. REUTERS/John Macdougall/Pool

Sweden's Crown Princess Victoria walks next to her husband Prince Daniel during a visit to Universidad de Lima, in Lima, Peru October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria (L) and her husband Prince Daniel attend an education seminar at Universidad de Lima, in Lima, Peru October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria (C) and her husband Prince Daniel (R) greet participants during an education seminar at Universidad de Lima, in Lima, Peru October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria and her husband Prince Daniel attend an education seminar at Universidad de Lima, in Lima, Peru October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria walks next to her husband Prince Daniel (L) during a visit to Universidad de Lima, in Lima, Peru October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria walks next to her husband Prince Daniel (L) during a visit to Universidad de Lima, in Lima, Peru October 19, 2015. REUTERS/Guadalupe Pardo TPX IMAGES OF THE DAY

Sweden's Crown Princess Victoria waves to members of the media during a visit to Universidad de Lima, in Lima, Peru October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria arrives at the government palace in Lima, October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria (2nd R), accompanied by husband Prince Daniel (R), shakes hands with Peru's President Ollanta Humala next to first lady Nadine Heredia at the government palace in Lima, October 19, 2015. REUTERS/Guadalupe Pardo

Sweden's Crown Princess Victoria (2nd R) accompanied by her husband Prince Daniel stands next to Peru's President Ollanta Humala (L) and first lady Nadine Heredia at the government palace in Lima, October 19, 2015. REUTERS/Guadalupe Pardo

Queen Silvia of Sweden attends the "Call to Action for Children and the Sustainable Development Goals" event held by Sweden and the World Childhood Foundation ahead of the United Nations General Assembly at the U.N. headquarters in New York, September 24, 2015. REUTERS/Darren Ornitz

Queen Silvia of Sweden speaks at the "Call to Action for Children and the Sustainable Development Goals" event ahead of the United Nations General Assembly at the U.N. headquarters in New York, September 24, 2015. REUTERS/Darren Ornitz

Queen Silvia of Sweden speaks at the "Call to Action for Children and the Sustainable Development Goals" event ahead of the United Nations General Assembly at the U.N. headquarters in New York, September 24, 2015. REUTERS/Darren Ornitz