Monarchy of Monaco Monarchy of Monaco The Sovereign Prince () or Princess of Monaco () is the reigning monarch and head of state of the Principality of Monaco. All reigning princes and princesses have officially taken the name of the House of Grimaldi, although some have belonged to other families (Goyon de Matignon or Polignac) in the male line. The present reigning prince is Albert II. Monaco, along with Liechtenstein and Vatican City, is one of only three states in Europe where the monarch still plays an active role in day-to-day politics. The Prince or Princess of Monaco exercises his or her authority
Monaco succession crisis of 1918 to one form or another of proximity of blood, and the Grimaldis' hitherto exclusive control of Monaco's dynastic marital policy was what threatened to enthrone a German duke on France's border, even after the Empire's defeat in war. Just as the ruling families of Britain, Russia, Belgium, and the Netherlands had all become patrilineally German by the twentieth century due to the propensity of monarchical heiresses, seeking dynastically equal marriages, to choose husbands from among Germany's many minor princely families, Monaco was on the verge of the same fate. Although the Grimaldis did not require inter-marriage with royalty by law