WARSAW, POLAND - NOVEMBER 25: (L-R) Crown Princess Mary of Denmark, Crown Prince Frederik of Denmark, President of Poland, Andrzej Duda and his wife, Agata Duda pose for a portrait during the official welcome ceremony at the Presidential Palace on November 25, 2019 in Warsaw, Poland. The Danish Crown Prince and his wife are on an official visit to Poland on the occasion of the centenary of the resumption of diplomatic relations between Denmark and Poland. (Photo by Omar Marques/Getty Images)
WARSAW, POLAND - NOVEMBER 25: Crown Prince Frederik of Denmark and Crown Princess Mary of Denmark arrive at the Tomb of Unknown Soldiers on November 25, 2019 in Warsaw, Poland. The Danish Crown Prince and his wife are on an official visit to Poland on the occasion of the centenary of the resumption of diplomatic relations between Denmark and Poland. (Photo by Omar Marques/Getty Images)
WARSAW, POLAND - NOVEMBER 25: Crown Prince Frederik of Denmark and Crown Princess Mary of Denmark arrive at the Tomb of Unknown Soldiers on November 25, 2019 in Warsaw, Poland. The Danish Crown Prince and his wife are on an official visit to Poland on the occasion of the centenary of the resumption of diplomatic relations between Denmark and Poland. (Photo by Omar Marques/Getty Images)
WARSAW, POLAND - NOVEMBER 25: Crown Prince Frederik of Denmark and Crown Princess Mary of Denmark pay their respects at the Tomb of Unknown Soldiers on November 25, 2019 in Warsaw, Poland. The Danish Crown Prince and his wife are on an official visit to Poland on the occasion of the centenary of the resumption of diplomatic relations between Denmark and Poland. (Photo by Omar Marques/Getty Images)