The wedding of Prince Philippe, Duke of Brabant, and Mathilde d'Udekem d'Acoz took place on 4 December 1999 in Brussels, Belgium.

The civil proceedings were conducted at Brussels Town Hall while the religious ceremony took place at the Cathedral of St. Michael and St. Gudula.

[5] The first of the day's main events took place in the Gothic setting of Brussels Town Hall where Philippe and Mathilde contracted a civil marriage in the French, Dutch and German languages.

[citation needed] Thereafter the couple traveled to the nearby Cathedral of St. Michael and St. Gudula to marry according to the rites of the Roman Catholic Church.

[6] The run up to the wedding was said to have led to widespread feelings of positive sentiment in Belgium,[7] with the potential for greater unity between the country's Dutch-speaking north and French-speaking south.