He also served the Medical Professor John Huber as Famulus and helped to gather and prepare herbs and medicines.

Soon Thurneysser was considered by Emperor Ferdinand I and his sons, as well as personalities such as scholars Pietro Paolo Vergerio and Gerolamo Cardano and others as an expert in the areas of the Pharmaceutical, chemistry, metallurgy, botany, mathematics, astronomy and medicine.

Philippine Welser, the wife of Ferdinand II of Habsburg, Archduke of Tyrol commissioned Thurneysser to make more journeys, including through the East and North Africa.

For his work, John George made part of the former Franciscan monastery (today known as the Grey Abbey) available to Thurneysser.

In the Grey Abbey, Leonhard Thurneysser organized his home, his library, a printing company and his laboratory.

He created the first scientific curiosity cabinet in Brandenburg and a botanical garden and he kept exotic animals at court.

The full title of the second edition in the spelling of the day, was: Translation: He also wrote an encyclopedia similar to the 1583 brochure Magna Alchymia, which included a dictionary of terms used by Paracelsus.