 After King Paul's death, Peter found himself at odds with Paul's son and successor, King Constantine II.Had he not been deemed excluded from the line of succession due to his unsuitable marriage, Peter would have been heir presumptive to Constantine II according to the original laws of succession.However, the Parliament of Greece modified the Constitution to replace the original agnatic primogeniture with male-preference cognatic primogeniture, thereby introducing a number of female dynasts and their descendants into the line of succession.