On October 9, 1835, French composer, organist, conductor, and pianist of the Romantic era Camille Saint-Saëns was born. He was something of an anomaly among French composers of the nineteenth century in that he wrote in virtually all genres, including opera, symphonies, concertos, songs, sacred and secular choral music, solo piano, and chamber music.
On September 20, 450 AD, the Battle of the Catalaunian Plains also referred to as the Battle of Chalons took place. A coalition led by the Roman general Flavius Aëtius and the Visigothic king Theodoric I against the Huns and their allies commanded by their leader Attila faced each other in a decisive battle that should decide the fate of Europe and the whole Western civilization...
On Sep 19, 1840, Marie Lafarge became the first person convicted largely on direct forensic toxicological evidence http://yovisto.blogspot.it/2013/09/madame-lafarge-first-victim-of-marsh.html
On August 19, 1839, French artist and physicist Louis Jacques Mandé Daguerre, after announcing his invention to the French Academy of Sciences, went public with his newly developed photographic process called Daguerrotype, the wold's first practicable photographic process.