ENAt the start of the 19th century, geological research in Lithuania tended to encourage prospecting for useful minerals as the sources of salt, coal, gypsum, and iron ore deposits. Mineralogy – a popular discipline at that time – was introduced at the Vilnius Imperial University in 1803. Roman Symonowicz (1763–1813), Doctor of Philosophy and Medicine, but greatly interested in mineralogy, was invited to give lectures on mineralogy. Symonowicz was one of A. G. Werner’s students at the Freiberg Mining Academy in 1804/1805; he was a diligent person and a thorough mineralogist. In 1806, Symonowicz published the first mineralogy handbook (in Polish), and wrought up the first classification of minerals. Symonowicz earned fame for his ‘mineralogical’ trip to Transylvania, Hungary, and Poland, carried out in 1803. This article presents new documents covering so far unknown events from more than two hundred years ago that were, for the first time, discovered in the Krakow (Poland), Vienna (Austria) and Banská Štiavnica (Slovakia) archives.