Siegmund (Sigismund) Freiherr von Herberstein (or Baron Sigismund von Herberstein; 23 August 1486 – 28 March 1566) was a Carniolan diplomat, writer, historian and member of the Holy Roman Empire Imperial Council. He was most noted for his extensive writing on the geography, history and customs of Russia, and contributed greatly to early Western European knowledge of that area. Source: Wikipedia (en)