[citation needed] Donatus also manages Prinz von Hessen, a winery specializing in production of varietal vintages on his 45 hectare vineyard.

[4] Donatus married Countess Floria Franziska Marie-Luisa Erika von Faber-Castell (born 14 October 1974, Düsseldorf) in a civil ceremony in Wiesbaden on 25 April 2003.

[4] Prince Donatus and Floria Franziska are 6th cousins, as both descended from Frederick II, Landgrave of Hesse-Kassel and his first wife Princess Mary of Great Britain.

[5][better source needed] Held at the Johanneskirche and followed by a grand ball in the Green Salon, state room of the former Friedrichshof palace in Kronberg (now a luxury hotel and golf course owned by the House of Hesse's family foundation) where Donatus's ancestress, the German Empress Frederick, Princess Royal, lived in widowhood, more than 300 guests were present.

[11][12][13] Founded in 1928, the Foundation of the House of Hesse is the successor institution of a family trust that had been established in 1830, confiscated by the Kingdom of Prussia in 1866, and re-established after partial restitution in 1878.