| Jean-Pierre Cluysenaar | |
| Nationality: | Belgian, |
| Birth Date: | 28 March 1811 |
| Birth Place: | Kampen, The Netherlands |
| Death Date: | 16 February 1880 |
| Death Place: | Brussels, Belgium |
| Significant Buildings: | Galeries Royales Saint-Hubert |
Jean-Pierre Cluysenaar (1811–1880) was a Belgian architect. He is the father of the Cluysenaar family.
Cluysenaar was born in Kampen in the Netherlands as a son of Joannes Kluysenaar and Garidenia Kluysenaar, a Dutch family of architects and engineers. Jean-Pierre Cluysenaar was the father of the Cluysenaar family. His descendants became famous Belgian painters, sculptors and architects. During the United Kingdom of the Netherlands his family settled in the southern Belgian provinces.
Cluysenaar studied architecture at the Royal Academy of Fine Arts in Brussels under Tilman-François Suys. His teacher influenced him in his preference for the architecture of the Italian Renaissance.
Cluysenaar had a talent for business. He took the initiative for some very profitable real estate projects—such as the Royal Saint-Hubert Galleries in Brussels—in which he played the double role of architect and co-financier. He also had a good reputation amongst the Belgian nobility and high bourgeoisie. He received many commissions for designing large town houses (so called "hôtels"), mansions and châteaux. Cluysenaar was always prepared to adapt his designs to the desires and taste of his elite patrons. The many private mansions he built greatly differ in style. He designed elegant Palladian villas, as well as more sturdy neo-Gothic castles.
His stylistic versatility is also apparent in the many public buildings he designed, such as the neo-Renaissance Royal Conservatory in Brussels and the "Tudor style" railway station in Aalst.
A brief selection of the more than 200 projects in which Cluysenaar was involved: