Napoléon Louis's brother,Napoléon Charles, died in 1807 at the age of four.[1] On his death, Napoléon Louis becamePrince Royal ofHolland.[2] It also made Napoléon Louis the second eldest nephew of Emperor Napoléon I, who at the time had no legitimate children, and he was regarded as his uncle's likely eventual successor.[3] He lost this presumptive status on 20 March 1811 when Napoléon I's second wife,Marie Louise, gave birth to a son,Napoléon François Joseph Charles Bonaparte, who was styled theKing of Rome and later Duke of Reichstadt.[4]
In 1809, Napoléon I appointed him Grand Duke ofBerg, a position he held until 1813.[5]
On 1 July 1810,Louis I of Holland abdicated his throne in favour of Napoléon Louis.[6] For the nine days between his father's abdication and the fall of Holland to the advancing French army in July 1810, Napoléon Louis reigned asLodewijk II, King of Holland.[7]
When Napoléon I was deposed in 1815 after theBattle of Waterloo, theHouse of Bourbon was restored to the French throne.[8] Napoléon Louis fled into exile, although the Bonaparte family never abandoned hopes of restoring theNapoleonic Empire.[9]
On 23 July 1826 Napoléon Louis married his first cousin,Charlotte, the daughter ofJoseph Bonaparte, eldest brother of Napoléon I.[10] He and his younger brotherLouis-Napoléon Bonaparte settled in Italy, where they embraced liberal politics and became involved with theCarbonari, who opposed Austrian domination of northern Italy.[11]
On 17 March 1831, while fleeing Italy during a crackdown on revolutionary activity by Papal and Austrian forces, Napoléon Louis, who was suffering frommeasles, died inForlì.[12] The French Empire was eventually restored by his younger brother Louis-Napoléon, who becameNapoléon III in 1852.[13]