|Prime Minister of Luxembourg|
6 December 1848 – 23 September 1853
|Preceded by||G.T.I. de la Fontaine|
|Succeeded by||Charles-Mathias Simons|
|Born||6 March 1792|
Luxembourg, Austrian Netherlands
|Died||26 November 1866 (aged 74)|
Jean-Jacques Madeleine Willmar (6 March 1792 – 26 November 1866) was a Luxembourgian politician and jurist. An Orangist, he was the second Prime Minister of Luxembourg, serving for five years, from 6 December 1848 until 23 September 1853.
From 2 December 1848 to 23 September 1853 he was prime minister and Administrator-General (Minister) for Foreign Affairs, Justice, Religion and education. Norbert Metz, who had become Finance Minister, and who was pro-Belgian and against membership of the German Confederation and the Zollverein, had a great influence on foreign policy, which led to tensions with Germany. Relations with the Netherlands also became chilled after the death of William II in 1849. His son, William III, who had himself represented by his brother Prince Henry, led a strictly conservative and reactionary policy, and deposed the government in 1853. Willmar's time in office saw the decision to introduce the Franc instead of the Guilder as the accounting unit of the government. In 1854, the first Luxembourgish copper coins were made.
- Thewes, Guy. "Les gouvernements du Grand-Duché de Luxembourg depuis 1848". Service information et presse du gouvernment. Luxembourg: Imprimerie Centrale, 2011. p. 16-19
G T I de la Fontaine
| Prime Minister of Luxembourg
| Administrator-General for Foreign Affairs|
| Administrator-General for Justice
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