In 1801 the last Catholic van Zuylen in the Netherlands, the bachelor Anton-Martinus van Zuylen van Nijevelt (1708–1801), bequeathed the property to his cousin Jean-Jacques van Zuylen van Nyevelt (1752–1846) of the Catholic branch in the Southern Netherlands. In 1890, De Haar was inherited by Jean-Jacques' grandson Etienne Gustave Frédéric Baron van Zuylen van Nyevelt van de Haar (1860–1934), who married Baroness Hélène de Rothschild. They contracted architect Pierre Cuypers in 1892 to rebuild the ruinous castle, which took 15 years.[1]