Mu and Sigma waltzing the Congress

Picture: © Irene Klein

"Le congrès danse beaucoup, mais il ne marche pas."
("The congress does not move forward, it dances.")
Prince Charles de Ligne’s famous words at the Congress of Vienna (1814-1815)

 
 
See, e.g., Wikipedia for:
Congress of Vienna (1814-1815)
Vienna Waltz

 
(𝜇 & 𝜎 from standard notation for drift and volatility of a diffusion model)