Between the first abdication of Napoleon in 1814 and the Battle of Waterloo and the final abdication of Napoleon in 1815, the Congress of Vienna was convened by the Great Powers to redraw the borders of Europe. During this time, it was decided that the mediatised principalities, free cities, and secularised states would not be reinstated. Instead, the former rulers who held a vote within the Imperial Diet were to enjoy an improved aristocratic status, being deemed equal to the still-reigning monarchs for marital purposes, and entitled to claim compensation for their losses. But it was left to each of the annexing states to compensate mediatised dynasties, and the latter had no international right to redress if dissatisfied with the new regime's reimbursement decisions. In 1825 and 1829, those houses which had been designated the "Mediatized Houses" were formalised, at the sole discretion of the ruling states, and not all houses that ruled states that were mediatised were recognised as such.
