August Ferdinand, Earl Breuner-Eneckevoirth (1796–1877) built Schloss Grafenegg in its current form. As his son, August Johann (1828–1894), had only daughters, Schloss Grafenegg passed into the family of Viktor II, Duke of Ratibor and Prince of Corvey (1847–1929) upon his marriage with the oldest daughter Maria (1856–1929).

The second son of the 3rd Duke of Ratibor and Prince of Covey (1879–1945), Franz Albrecht (1920) was adopted by his Great-Aunt Clementine, Princess of Metternich-Sándor (1870–1963). She was a granddaughter of the Austrian Chancellor Clemens Wenzel Lothar Prince of Metternich-Winneburg (1773–1859), who in 1815, with the Wiener Congress, influenced the course of European history.

As his older brother Viktor, Crown Prince of Ratibor and Corvey, met an untimely death in battle in 1939 aged 23, Franz Albrecht inherited the German, Austrian and Hungarian properties belonging to his father on the latter’s death in 1945.

The current owner of the Schloss Grafenegg estate, Tassilo Metternich-Sándor (1965), married to Clarissa Countess of Toerring-Jettenbach, manages the enterprises of Schloss Grafenegg. His father Franz Albrecht Metternich-Sándor (1920– 2009) initiated the tradition of holding major artistic events and exhibitions in Grafenegg in 1971.