Karl-Theodor, Duke in Bavaria (9 August 1839 – 30 November 1909), was a member of the House of Wittelsbach and a professional oculist. He was the favorite brother of the Empress Elisabeth of Austria , and father of Queen Elisabeth of the Belgians .
Bavaria was given to the Babenberg margrave Leopold IV of Austria, a half-brother of the new king Conrad. Saxony, which he had attempted to hold but was not officially invested with, was given to the Ascanian count Albert the Bear, son of Eilika of Saxony, a younger daughter of the last Billung duke Magnus. Death and aftermath