Paper presents a famous Polish professor, scholar, physician and educator Jędrzej Śniadecki (1768–1838) who, after studies in Italy and Scotland, settled in Lithuania, and gave 40 years of his most active life to Vilnius University. From all publications, the manual of chemistry Początiki Chemii (Origins of Chemistry, 1800), the fundamental philosophical work Teoria Jestestw Organicznych (Theory of Organic Beings, 1804, 1838) brought him the greatest glory. Sniadecki was a pioneer in the field of biochemistry and pediatry.