Now a "grande dame", she enjoyed her last great friendship with a powerful leader, Charles de Gaulle, who invited her in 1963 to an Élysée Palace reception in the honour of the Swedish Sovereigns. De Gaulle also took a copy of "Isvor, Pays des Saules" with him when he visited Romania in 1968, and told her in the same year: "... you do personify Europe to me." Marthe was then 82 years old. She died on 28 November 1973 in Paris.