1973 in Belgium

Baudouin was King of the Belgians from 17 July 1951 until his death in 1993. He was the last Belgian king to be sovereign of the Congo, before it became independent in 1960 and became the Democratic Republic of the Congo.

The monarchy of Belgium is the constitutional and hereditary institution of the monarchical head of state of Belgium. As a popular monarchy, the Belgian monarch uses the title king/queen of the Belgians and serves as the country's head of state and commander-in-chief of the Belgian Armed Forces.

Astrid of Sweden was a member of the Swedish House of Bernadotte and later became Queen of the Belgians as the first wife of King Leopold III. Following her marriage to Leopold in November 1926, she assumed the title of Duchess of Brabant. Astrid held the position of Queen of the Belgians from 23 February 1934 until her death in 1935. Known for her charitable efforts, she focused particularly on causes related to women and children.

Laeken or Laken is a residential suburb in the north-western part of the Brussels-Capital Region, Belgium. It belongs to the municipality of the City of Brussels and is mostly identified by the Belgian postal code: 1020. Prior to 1921, it was a separate municipality.

Philippe is King of the Belgians. He is the eldest child of King Albert II and Queen Paola. He succeeded his father upon the former’s abdication for health reasons on 21 July 2013. He married Mathilde d'Udekem d'Acoz in 1999, with whom he has four children. Their eldest child, Princess Elisabeth, is first in the line of succession.

Fabiola Fernanda María-de-las-Victorias Antonia Adelaida de Mora y Aragón was Queen of the Belgians as the wife of King Baudouin from their marriage in 1960 until his death in 1993. The couple had no children, as all five of Fabiola's pregnancies resulted in miscarriage, so the Crown passed to her husband's younger brother, King Albert II.

Mathilde Marie Christine Ghislaine Countess d'Udekem d'Acoz is Queen of the Belgians as the wife of King Philippe. She is the first native-born Belgian queen, and has four children. She formerly worked as a speech therapist. She is involved with a range of organisations which address social issues including education, child poverty, intergenerational poverty, the position of women in society and literacy.

Prince Gabriel of Belgium is the elder son and second child of King Philippe and Queen Mathilde of Belgium. He is currently second in line to the throne of Belgium after his elder sister, Elisabeth.

The King Baudouin Foundation (KBF) is a foundation based in Brussels (Belgium). It seeks to change society for the better and invests in inspiring projects and individuals.

Belgian–Dutch relations refer to interstate relations between Belgium and the Netherlands. It can be seen as one of the closest international relationships in existence, marked by shared history, culture, institutions and language, extensive people-to-people links, aligned security interests, sporting tournaments and vibrant trade and investment cooperation. Both nations are members of the European Union and NATO and, together with Luxembourg, form the Low Countries and the Benelux economic union.