Pierre de Decker

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Pierre de Decker
Pierre De Decker.jpg
10th Prime Minister of Belgium
In office
30 March 1855 – 9 November 1857
MonarchLeopold I
Preceded byHenri de Brouckère
Succeeded byCharles Rogier
Personal details
Born25 January 1812
Died4 January 1891(1891-01-04) (aged 78)
Political partyCatholic Party

Pierre (Pieter) Jacques François de Decker (25 January 1812 – 4 January 1891) was a Belgian Roman Catholic politician, statesman and author.

He was educated at a Jesuit school, studied law at Paris, and became a journalist on the staff of the Revue de Bruxelles. In 1839 he was elected to the Belgian lower chamber, where he gained a great reputation for oratory. He was a member of parliament from 1839 to 1866. As such he took historical initiatives to promote the Dutch language that was being evicted from political life after the Belgian Revolution of 1830 (against the Union with Holland as the United Kingdom of the Netherlands), although the majority of the population (Flanders) spoke Dutch. So De Decker was at the origin of the 'Pétitionnement en faveur de la langue Flamande' in 1840 and of the instauration of the 'Flemish Commission' in 1855.

In 1855 he became Minister of the Interior and the tenth Prime Minister of Belgium. As such he was the first leader of the government since the revolution of 1830 who dared to address the parliament in Dutch (Flemish). He attempted, by combining the moderate elements of the Catholic and Liberal parties, the impossible task of resolving the educational and other questions by which Belgium was distracted.

In 1866 he retired from politics and went into business, with disastrous results. He became involved in financial speculations which lost him his good name as well as the greater part of his fortune; and, though he was never proved to have been more than the victim of clever operators, when in 1871 he was appointed by the Catholic cabinet governor of Limburg, the outcry was so great that he resigned the appointment and retired definitively into private life. He died in 1891.


De Decker, who was a member of the Belgian academy, wrote several historical and other works of value, of which the most notable are:

  • Etudes historiques et critiques sur les monts-de-piété en Belgique (Brussels, 1844)
  • De l'influence du libre arbitre de l'homme sur les fails sociaux (1848)
  • L'esprit de parti et l'esprit national (1852)
  • Etude politique sur le vicomte Ch. Vilain Xliii (1879)
  • Episodes de l'histoire de l'art en Belgique (1883)
  • Biographie de H. Conscience (1885)


  •  This article incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "Decker, Pierre de". Encyclopædia Britannica. 7 (11th ed.). Cambridge University Press. p. 913.

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Political offices
Preceded by
Henri de Brouckère
Prime Minister of Belgium
Succeeded by
Charles Rogier