Liechtenstein's succession to the throne will also include women in the future, Crown Prince Alois announced.
"We want to ensure that both the principality and the princely house are led by the person best prepared for the responsibility," he said in a speech during the country's National Day.
The principality is thus changing the regulations that, according to the newspaper Landesspiegel, have been in force since 1606.
But it will be a while before a princess sits on the throne. The current prince, Hans Adam II, remains head of state but has handed over most of the duties to his son, Crown Prince Alois. His firstborn, 31-year-old Joseph Wenzel, does not yet have an heir.
Liechtenstein first introduced women's suffrage in 1984, but has had a woman - Brigitte Haas - as prime minister since last year.
