Belgium is a constitutional, popular monarchy and a federal parliamentary democracy.

Republics and popular monarchies are theoretically based on popular sovereignty.

Currently, Belgium has the only explicit popular monarchy.

The romantic revolutions led to the establishment of very similar constitutional monarchies, called popular monarchies.

Popular monarchy is a system of monarchical governance in which the monarch's title is linked with a popular mandate rather than a constitutional state.

Some of the obsession surrounding Will and Kate is due to Britain's status as the world's most famous and popular monarchy, making the April 29 vows exceptionally high-profile.

This was unprecedented; although Baudoin was nominally Belgium's chief executive, Royal Assent has long been a formality (as is the case in most constitutional and popular monarchies).

Belgium is the only remaining popular monarchy in the world: The monarch is formally known as the "King of the Belgians", not the "King of Belgium".

Louis-Philippe was crowned "Popular monarchy," instead of "King of France": this marked his acceptance of the popular sovereignty, which replaced the 'Ancien Régime' 's divine right of kings.

The assembly chose a constitutional popular monarchy as the form of government for Belgium and chose the son of the French king Louis-Philippe, Louis, Duke of Nemours, as the new head of state.

The style "King of the French", used for the first time instead of "King of France (and Navarre)", was an innovation intended to inaugurate a "popular monarchy" which linked the monarch's title to the people, not to the territory of France.

The title "King of the Belgians" indicates a popular monarchy linked to the people of Belgium (i.e., a living and hereditary Head of State; yet ratified by popular will), whereas the former would indicate standard constitutional or absolute monarchy linked to territory or state.