The Blancs had already set up a highly successful casino (in fact the largest in Europe) in Bad-Homburg in the Grand Duchy of Hesse-Homburg, a small German principality comparable to Monaco, and quickly petitioned Charles III to rename a depressed seaside area known as "Les Spelugues (Den of Thieves)" to "Monte Carlo (Mount Charles)." They then constructed their casino in the newly dubbed "Monte Carlo" and cleared out the area's less-than-savoury elements to make the neighbourhood surrounding the establishment more conducive to tourism.