When Mme Tesch died in 1919, in the absence of direct heirs the property was bequeathed equally to Emile Mayrisch (the Director General of ARBED) and Gaston Barbanson.

[1][2] When Barbanson died in 1946, his widow and daughter waived their rights of inheritance, and the property passed to a charitable fund set up in 1913 by Edmée Tesch.

During the Hungarian Revolution of 1956 the mission was attacked by a group of demonstrators, and the ground floor of the château sustained considerable damage.

[2] On 5 June 1973 the château and an adjacent 2.8 hectare plot of land was sold to the Embassy of the Soviet Union for 8.5 million francs.

The ambassador, who normally utilised the château as his official residence, was also required to find other accommodations, and embassy functions were hosted in the Grand Théâtre.