Duchy of Westphalia
Following to the Congress of Vienna, Prussia received a large amount of territories in the Westphalian region and created the Province of Westphalia in 1815. After in 1816, the former Duchy of Westphalia and the counties of Wittgenstein and in 1851 the condominium of Lippstadt had joined the province, Westphalia had received its modern territorial shape.