1803 births

Guglielmo Libri Carucci dalla Sommaja (1 January 1803 – 28 September 1869) was an Italian count and mathematician, who became known for his love and subsequent theft of ancient and precious manuscripts. After being appointed the Inspector of Libraries in France, Libri began stealing the books he was responsible for. He fled to England when the theft was discovered, along with 30,000 books and manuscripts inside 18 trunks. In France, he was sentenced to 10 years in jail in absentia; some of the stolen works were returned when he died, but many remained missing.

Johann Wilhelm Preyer (July 19, 1803 – February 20, 1889) was a German still life painter of the Düsseldorf school of painting.

Charles Frédéric Kuhlmann (22 May 1803 – 27 January 1881) was a French chemist who patented the reaction for converting ammonia to nitric acid, which was later used in the Ostwald process.He was both a research scientist and a professor at Université Lille Nord de France. He promoted chemical engineering education for science graduates in Lille and supported the development of École centrale de Lille (IDN).
As an entrepreneur starting in 1829, he established his own chemical company producing sulfuric acid. This company later merged into Pechiney Ugine Kuhlmann group.

Jean Kickx (17 January 1803, Brussels – 1864) was a Belgian botanist. His father, also known as Jean Kickx (1775–1831) was a botanist and mineralogist; his son Jean Jacques Kickx (1842–1887) was a professor of botany at the University of Ghent.
In 1830 he obtained his PhD at Leuven, later serving as a professor of botany in Brussels (1831–1835) and at the University of Ghent (1835–1864). He was a co-founder of the Société royale de botanique de Belgique.The mycological genus Kickxella (order Kickxellales) was named in his honor by Eugène Coumans.

Gaspard Goyrand (3 February 1803 – 23 June 1866) was a French general practitioner, surgeon and politician from Aix-en-Provence. He helped treat cholera from 1835 to 1854, while serving as Deputy Mayor of Aix from 1838 to 1848.

Hélène Jégado (1803 – 26 February 1852) was a French domestic servant and serial killer. She is believed to have murdered as many as 36 people with arsenic over a period of 18 years. After an initial period of activity, between 1833 and 1841, she seems to have stopped for nearly ten years before a final spree in 1851.

Christian Andreas Doppler ( ; 29 November 1803 – 17 March 1853) was an Austrian mathematician and physicist. He formulated the principle – now known as the Doppler effect – that the observed frequency of a wave depends on the relative speed of the source and the observer.

Sir Titus Salt, 1st Baronet (20 September 1803 – 29 December 1876) was a manufacturer, politician and philanthropist in Bradford, West Riding of Yorkshire, England, who is best known for having built Salt's Mill, a large textile mill, together with the attached village of Saltaire, West Yorkshire.

Adrian Ludwig Richter (September 28, 1803 – June 19, 1884) was a German painter and etcher, who was strongly influenced by Erhard and Chodowiecki. He was a representative of both Romanticism and Biedermeier styles.
He was the most popular, and in many ways the most typical German illustrator of the middle of the 19th century. His work is described as typically German and homely as are the fairy-tales of Grimm, for whom he produced several woodcuts.

Julien Auguste Pélage Brizeux (12 September 1803 – 3 May 1858) was a French poet. He was said to belong to a family of Irish origin, long settled in Brittany. He was educated for the law, but in 1827 he produced at the Théâtre Français a one-act verse comedy, Racine, in collaboration with Philippe Busoni.
His most important works are, first, Marie (1832, 1836, 1840), then, Les Bretons (1845, 1846). He also wrote in the Breton language, notably Telenn-Arvor and Furnez Breiz.