Napoleon II (Napoléon François Joseph Charles Bonaparte; 20 March 1811 – 22 July 1832) was the disputed Emperor of the French for a few weeks in 1815. He was the son of Emperor Napoleon I and Empress Marie Louise, daughter of Emperor Francis I of Austria .As the only legitimate son of Napoleon I, he was already constitutionally the Prince Imperial and heir apparent, but the Emperor also gave his son the title of King of Rome. Three years later, the First French Empire collapsed. Napoleon I saw his second wife and their son for the last time on 24 January 1814. On 4 April 1814, he abdicated in favour of his three-year-old son after the Six Days' Campaign and the Battle of Paris. The child became Emperor of the French under the regnal name of Napoleon II. However, on 6 April 1814, Napoleon I fully abdicated and renounced not only his own rights to the French throne, but also those of his descendants. The Treaty of Fontainebleau in 1814 gave the child the right to use the title of Prince of Parma, of Piacenza, and of Guastalla, and his mother was styled the Duchess of Parma, of Piacenza, and of Guastalla.
From the spring of 1814 onwards, the young Napoleon lived in Austria and was known as "Franz", a German language cognate of his second given name, François. In 1818, he was awarded the title of Duke of Reichstadt by his maternal grandfather, Emperor Francis. He was educated by a staff of military tutors and developed a passion for soldiering, dressing in a miniature uniform like his father's and performing maneuvers in the palace. At the age of 8, it was apparent to his tutors that he had chosen his career.
In 1831, Franz was given command of an Austrian battalion, but he never got the chance to serve in any meaningful capacity. In 1832, he caught pneumonia and was bedridden for several months. His poor health eventually overtook him and on 22 July 1832 Franz died of tuberculosis at Schönbrunn Palace in Vienna. He had no children; thus the Napoleonic claim to the throne of France passed to his uncle Joseph Bonaparte and later to his cousin, Louis-Napoléon Bonaparte, who later founded and reigned over the Second French Empire, styling himself Napoleon III. His last words were, "My story is my birth and death. Between my cradle and my grave, there is a big zero".