Dionysius Koolen
| Dionysius Koolen | |
|---|---|
| Koolen in 1925 | |
| Member of the Council of State | |
| In office 1 May 1926 – 24 March 1945 | |
| Vice President | See list 
 | 
| Minister of Labour, Commerce and Industry | |
| In office 4 August 1925 – 8 March 1926 | |
| Prime Minister | Hendrikus Colijn | 
| Preceded by | Piet Aalberse | 
| Succeeded by | Jan Rudolph Slotemaker de Bruïne | 
| Speaker of the House of Representatives | |
| In office 14 October 1920 – 5 August 1925 | |
| Preceded by | Dirk Fock | 
| Succeeded by | Charles Ruijs de Beerenbrouck | 
| Member of the House of Representatives | |
| In office 19 September 1905 – 5 August 1925 | |
| Preceded by | Wilhelmus Friesen | 
| Constituency | Grave (1905–1918) | 
| Personal details | |
| Born | Dionysius Adrianus Petrus Norbertus Koolen 21 January 1871 Rijswijk, Netherlands | 
| Died | 24 March 1945 (aged 74) Voorschoten, Netherlands | 
| Political party | Roman Catholic State Party (from 1926) | 
| Other political affiliations | General League (until 1926) | 
| Spouse | Maria Zumgahr (m. 1896) | 
| Children | 4 sons and 3 daughters | 
| Alma mater | Utrecht University | 
| Occupation | Politician · Civil servant · Jurist · Lawyer · Prosecutor · Judge · Academic administrator | 
Dionysius Adrianus Petrus Norbertus Koolen (21 January 1871 – 24 March 1945) was a Dutch Roman Catholic politician who served as a member of the House of Representatives from 1905 until 1925, as minister of Labour, Commerce and Industry between 1925 and 1926, and as a member of the Council of State from 1926 until his death in 1945. He was a member of the General League of Roman Catholic Electoral Associations and its successor, the Roman Catholic State Party (RKSP).