The title was used for the highest executive official of each province performing several duties, such as appointing lower administrators and maintaining peace and order, in the early Dutch Republic. As multiple provinces appointed the same stadtholder, the stadtholder of the powerful province of Holland at times functioned as the de facto head of state of the Dutch Republic as a whole during the 16th to 18th centuries, in an effectively hereditary role. For the last half century of its existence, it became an officially hereditary title under Prince William IV of Orange. His son, Prince William V, was the last stadtholder of all provinces of the Republic, until fleeing French revolutionary troops in 1795. His son, William I of the Netherlands, in 1815 became the first sovereign king of the United Kingdom of the Netherlands.
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