On September 22, 1593, Swiss-born German master engraver and publisher Matthäus Merian der Ältere was born. He is best known for his 21-volume set of the Topographia Germaniae, which includes numerous town plans and views, as well as maps of most countries and a World Map.
On September 21, 1847, the famous Mauritius "Post Office" stamps were issued by the British Colony Mauritius. They are among the rarest postage stamps in the world and a letter with both stamps on its cover is estimated to be worth more than 4 Million US$.
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 31, 1870, Italian physician and educator Maria Tecla Artemesia Montessori was born. She is probably best known for the philosophy of education that bears her name, and her writing on scientific pedagogy. Her educational method is in use today in public and private schools throughout the world.
On August 28, 1853, Russian engineer-polymath, scientist and architect Vladimir Grigoryevich Shukhov was born. He is renowned for his pioneering works on new methods of analysis for structural engineering that led to breakthroughs in industrial design. He was one of the most outstanding designers and constructors of the 19th and 20th century. Moreover, he is considered as one of Russia's most important engineers.
On August 27, 1858, Italian mathematician and philosopher Giuseppe Peano was born. He is he author of over 200 books and papers, and is considered the founder of mathematical logic and set theory. The standard axiomatization of the natural numbers is named the Peano axioms in his honor. These axioms have been used nearly unchanged in a number of metamathematical investigations, including research into fundamental questions of consistency and completeness of number theory.
On August 26, 1795, Italian physician, occultist and adventurer Giuseppe Balsamo aka Count Alessandro di Cagliostro passed away. The history and stories around Cagliostro are shrouded in rumour, propaganda, and mysticism. Some effort was expended to ascertain his true identity when he was arrested because of possible participation in the Affair of the Diamond Necklace.
On August 24, 1456, the printing of the famous Gutenberg Bible was completed. The Gutenberg Bible was the first major book printed with movable type in the West, applying the newly developed technology by Johannes Gutenberg. Widely praised for its high aesthetic and artistic qualities, the book has an iconic status.
On August 21, 1789, French mathematician Augustin-Louis Cauchy was born. He is considered one of the greatest mathematicians during the nineteenth century. There are 16 concepts and theorems named for Cauchy, more than for any other mathematician. Cauchy was one of the most prolific mathematicians of all times. Cauchy wrote 789 papers, a quantity exceeded only by Euler and Cayley, which brought precision and rigor to mathematics.