Marriage and issue
Princess Astrid married Archduke Lorenz of Austria-Este, subsequently head of the House of Austria-Este, on 22 September 1984 at the Church of Our Lady of Victories at the Sablon in Brussels. Lorenz is the eldest son of Robert, Archduke of Austria-Este (1915–1996) and Princess Margherita of Savoy-Aosta (1930–2022). Her husband was also created Belgian Prince by Royal Decree on 27 November 1995.
Princess Astrid and Prince Lorenz have five children:
Prince Amedeo Maria Josef Carl Pierre Philippe Paola Marcus d'Aviano of Belgium, Archduke of Austria-Este (born on 21 February 1986 at Cliniques universitaires Saint-Luc in Woluwé-Saint-Lambert, Brussels). Married Elisabetta "Lili" Maria Rosboch von Wolkenstein on 5 July 2014 in Rome's Basilica of Santa Maria in Trastevere. They have three children:
Archduchess Anna Astrid Marie of Austria-Este (born on 17 May 2016)
Archduke Maximilian Joseph Lorenz Ettore Karl Marcus d'Aviano of Austria-Este (born on 6 September 2019)
Archduchess Alix Lorenza Anne Marie Josephine of Austria-Este (born on 2 September 2023)
Princess Maria Laura Zita Beatrix Gerhard of Belgium, Archduchess of Austria-Este (born on 26 August 1988 at Cliniques universitaires Saint-Luc in Woluwé-Saint-Lambert, Brussels), married William Mark Isvy (b. 9 March 1991) on 10 September 2022 at the Cathedral of St. Michael and St. Gudula in Brussels. They have one son:
Albert Isvy (born on 26 January 2025)
Prince Joachim Karl-Maria Nikolaus Isabelle Marcus d'Aviano of Belgium, Archduke of Austria-Este (born on 9 December 1991 at Cliniques universitaires Saint-Luc in Woluwé-Saint-Lambert, Brussels).
Princess Luisa Maria Anna Martine Pilar of Belgium, Archduchess of Austria-Este (born 11 October 1995 at Clinique St Jean in Woluwé-Saint-Lambert, Brussels).
Princess Laetitia Maria Nora Anna Joachim Zita of Belgium, Archduchess of Austria-Este (born on 23 April 2003 at Clinique St Jean in Woluwé-Saint-Lambert, Brussels).