Josephus Theodorus Joannes Cuypers (10 June 1861, Roermond – 20 January 1949, Meerssen) was a Dutch architect; primarily known for his Catholic churches.
His first design for a church, Saint Urban's [nl] in Nes aan de Amstel, was completed in 1888.
The following year, he took over management of the family firm, when his father retired to Valkenburg aan de Geul.
Occasionally, he acted as a judge for their competitions, and served on committees; notably one delegated with helping to plan the Museumplein, a park with three museums and a concert hall.
Many years later, in 1920, he began working with his son, Pierre Cuypers jr. [nl], who had been employed by the French architect, Paul Bellot, and favored the Expressionist style.