Succession to the French throne
In 1791 the French National Assembly drew up a new, written Constitution to which the King gave his assent, and which governed France for the last year of the 18th century monarchy. For the first time it was necessary to define formally, as a matter of statutory constitutional law, the system of succession, and the titles, privileges and prerogatives of the Crown. In debating the succession to the Crown the contemporary understanding of the law of succession was publicly clarified. It rebutted the assertion by some that the claim by the Spanish line is a late construct, made to satisfy the ambitions of princes deprived of other claims. Indeed, it is evident that the issue of the rights of the Spanish line to the French crown remained an important constitutional issue.
Charter of 1815
The Charter of 1815, signed on April 22, 1815, was the French constitution prepared by Benjamin Constant at the request of Napoleon I when he returned from exile on Elba. More correctly known as the "Additional Act to the Constitutions of the Empire" the document extensively amended (in fact virtually replacing) the previous Napoleonic Constitutions (Constitution of the Year VIII, Constitution of the Year X and Constitution of the Year XII). The Additional Act reframed the Napoleonic constitution into something more along the lines of the Bourbon Restoration Charter of 1814 of Louis XVIII, while otherwise ignoring the Bourbon charter's existence. It was very liberal in spirit, and gave the French people rights which had previously been unknown to them, such as the right to elect the mayor in communes of less than 5,000 in population. Napoleon treated it as a mere continuation of the previous constitutions, and it therefore took the form of an ordinary legislative act "additional to the constitutions of the Empire".