Ritcheson is a member of Phi Beta Kappa, Fellow of the Royal Historical Society, a member of the Texas Institute of Letters, the Société Française d'Archeologie, Association pour le rayonnement de l'Opéra national de Paris, Brooks's, the Beefsteak Club, London, and the Cosmos Club, Washington, D.C.
Charles Darwin | Charles Dickens | Charles, Prince of Wales | Ray Charles | Charles II of England | Charles I of England | Charles Lindbergh | Charles de Gaulle | Charles II | Charles | Charles I | Prince Charles | Charles V | Charles Scribner's Sons | Charles Aznavour | Charles University in Prague | Charles Stanley | Charles Bukowski | Charles Mingus | Charles Ives | Charles Bronson | Charles Babbage | Charles III of Spain | Charles Cornwallis, 1st Marquess Cornwallis | Charles Baudelaire | Charles Sanders Peirce | Charles River | Charles Manson | Charles Laughton | Charles Dutoit |