Alain Poher, the President of the French Senate, served as Acting President of France from 28 April until 20 June 1969 (between the resignation of President Charles de Gaulle and the installation of his elected successor President Georges Pompidou) and again from 3 April until 27 May 1974 (between the death of President Georges Pompidou and the installation of his elected successor President Valéry Giscard d'Estaing).