FRANCIS JOSEPH I. (1830- ), emperor of Austria, king of Bohemia, and apostolic king of Hungary, was the eldest son of the archduke Francis Charles, second son of the reigning emperor Francis I., being born on the 18th of August 1830. His mother, the archduchess Sophia, was daughter of Maximilian I., king of Bavaria. She was a woman of great ability and strong character, and during the years which followed the death of the emperor Francis was probably the most influential personage at the Austrian court; for the emperor Ferdinand, who succeeded in 1835, was physically and mentally incapable of performing the duties of his office; as he was childless, Francis Joseph was in the direct line of succession. During the disturbances of 1848, Francis Joseph spent some time in Italy, where, under Radetzky, at the battle of St Lucia, he had his first experience of warfare. At the end of that year, after the rising of Vienna and capture of the city by Windischgraetz, it was clearly desirable that there should be a more vigorous ruler at the head of the empire, and Ferdinand, now that the young archduke was of age, was able to carry out the abdication which he and his wife had long desired. All the preparations were made with the utmost secrecy; on the 2nd of December 1848, in the archiepiscopal palace at Olmuetz, whither the court had fled from Vienna, the emperor abdicated. His brother resigned his rights of succession to his son, and Francis Joseph was proclaimed emperor. Ferdinand retired to Prague, where he died in 1875.