During the
Spanish Civil War in 1938, he supervised the evacuation of the
Museo del Prado collections to Switzerland. Before the German army arrived in Paris, and during the
German occupation, and against the orders of the
Vichy government, he organized the removal and safe storage, in the provinces (first in the
Château de Chambord,{{cite web With the help of
Rose Valland, he was instrumental in the saving of the French arts collections during World War II.{{cite web
Franz von Wolff-Metternich, who was responsible of the conservation of the French art collections under the
Kunstschutz principle, from 1940 to 1942, knew what was going on but voluntarily did not do anything. However, in 1942, Wolff-Metternich was recalled from France because he disagreed with the Nazis' looting, and at the end of the war, Jaujard had to hide in
Lozère.{{cite web == Personal life ==