The Count of St. Germain whose real name and origins remain unknown, was a European adventurer with interests and achievements in science, alchemy, philosophy, and the arts. He rose to prominence in the European high society of the mid-18th century due to his works and interests. He associated himself with some of the top contemporary figures including Casanova, Voltaire and Mozart.

Giacomo Girolamo Casanova was an Italian adventurer and author from the Republic of Venice. His autobiography, Histoire de ma vie, is regarded as one of the most authentic and provocative sources of information about the customs and norms of European social life during the 18th century.