After the French invasion of 1794 the Batavian Republic, a unitary state, was proclaimed. On 31 January 1795 it issued a bill of rights, the Verklaring der Rechten van den Mensch en van den Burger. On 1 May 1798 a new constitution, the first in the modern formal sense, the Staatsregeling voor het Bataafsche Volk, written by a Constitutional Assembly, went into force, approved by the National Assembly. The Napoleonic Kingdom of Holland, a constitutional monarchy, was established by the Constitutie voor het Koningrijk Holland on 7 August 1806. In 1810 the kingdom was annexed by the French Empire.