Louis II, Prince of Monaco
On 26 June 1922, Prince Albert I died in Paris. Louis Grimaldi ascended to the throne as Louis II, Prince of Monaco. While his reign never achieved the grandeur of his father, Louis II left an indelible imprint on the tiny principality. In 1924 the Monaco Football Club was formed and in 1929, the first Grand Prix of Monaco automobile race was held, won by Charles Grover (aka "Williams") driving a Bugatti painted in what would become the famous British racing green color. He collected artefacts belonging to Napoleon I which are now assembled and displayed in the Napoleon Museum attached to the Royal Palace in Monte Carlo.
Fürst
The present-day rulers of the sovereign principality of bear the title of ', and the title is also used in German when referring to the ruling princes of Monaco. The hereditary rulers of the one-time principalities of Bulgaria, Serbia, Montenegro, and Albania were also all referred to in German as ' before they eventually assumed the title of "king" (").