Princess Anne, the Queen 's only daughter, is 16th in line to the throne - behind Prince Andrew and Prince Harry - despite being the late Monarch's second oldest child. 'Primogeniture' determines how children inherit their parents' estate, and rules that apply to the rest of us also apply to the Royal Family and affect their chances of becoming King or Queen.
But due to a law enacted in 1701, the Royal Family operates under 'male-preference primogeniture', where male children receive a more prominent position than females. The Queen overturned the rule in 2013 under the Succession to the Crown Act, which gave women equal rights, but it wasn't backdated so Princess Anne's position remained unchanged.
