In 1809, Lucien Bonaparte came under pressure from his brother Napoleon to divorce his wife, Alexandrine de Bleschamp, and return to France from his Italian estates, where he was a virtual prisoner, needing permission to leave his own land.

[1] Following his brother's abdication in April 1814, Louis Lucien's father returned to France and then to Rome, where on 18 August 1814 he was made Prince of Canino, Count of Apollino, and Lord of Nemori by Pope Pius VII.

[2] Louis-Lucien Bonaparte grew up in Italy and was educated at the Jesuit college at Urbino, before studying chemistry and mineralogy.

He attended the first Riunione degli Scienziati Italiani, a conference of scholars of natural sciences, at Pisa, and published some early work on scientific subjects in Italy.

[1] He owned the only surviving copy of Athravaeth Gristnogavl and gave permission to the Cymmrodorion society to publish a facsimile in 1880.

[5] On 4 October 1833, in Florence, Louis Lucien Bonaparte married Maria Anna Cecchi, the daughter of a Florentine sculptor.

[1] His collection of chemical elements was bequeathed to the Science Museum, London[8] where it subsequently was on display during the UNESCO "International Year of the Periodic Table" in 2019.