Lorenzo Romano Carlo Avogadro was born on August 29th 1776 in Turin, Italy. He achieved his doctorette in ecclesiastical law and began to practice at the age of 20. Avogadro had a successfull legal career and also took up phillosphy. However, he is most famous for his contribution to chemistry. The science of chemistry was relatively new when Avogadro was a young adult. In 1811 he published his first work, which suggest that: equal volumes of all gases at the same temperature and pressure contain the same number of molecules This is now known as Avogadro's principle. What people tend to mis-understand, however, is that Avogadro did not come up with or even know about the mole (which he is often credited for finding). The mole was made years after his death on July 9th 1856. However, since it was based on Avogadro's principle, it is known as his number.