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.
Albert II, Prince of Monaco
On 2 April 2002, Monaco promulgated Princely Law 1.249, which provides that if a reigning prince dies without surviving legitimate issue, the throne passes to his legitimate siblings and their legitimate descendants of both sexes, according to the principle of male-preference primogeniture. Following Albert's accession, this law took full effect in 2005 when ratified by France, pursuant to the Franco-Monégasque Treaty regulating relations between the Principality and its neighbor. Prince Albert's sisters and their legitimate children thereby retained the right to inherit the Monegasque throne, which they would have otherwise lost upon the death of Prince Rainier.