|Duchy of Westphalia|
|1180 - 1815|
|To Prussia; Abolished||1815|
- This page is about the Duchy of Westphalia. See also: Westphalia (disambiguation)
The Duchy of Westphalia was a historic territory in the greater region of Westphalia, located in the east of modern North Rhine-Westphalia, Germany. Originally, Westphalia formed with Angria and Eastphalia one of the three main regions of Saxony.
Frederick I, the Archbishop of Cologne, had acquired half of the County of Arnsberg in 1102. The other counties of the region could not resist the encroachment of the Archbishopric, and soon after the counties of Werl, Reuthen and Volmarstein followed. The former count of Arnsberg created a new County known as Werl-Arnsberg, and successfully kept it independent of the Archbishops. When Henry the Lion of Saxony was defeated in 1180, the Holy Roman Emperor Frederick I Barbarossa promoted Philip I of Heinsberg, and officially gave to him these territories and the south of the former Duchy of Saxony as the Duchy of Westphalia.
The Archbishop of Cologne, Engelbert of Berg began a campaign to force the nobility in Westphalia into submission and to extract from them the stewardship of the various scattered church lands. Engelbert managed to connect the lands of the Duchy by annexing the territory from Hellweg to Diemel, and secured the south of the Sauerland at Attendorn in 1222. Further controversy of its expansion eventually leads to Engelbert's death at the hands of Frederick I of Isenberg in 1225. In 1260 by an agreement with the Dukes of Brunswick the Weser River became the official border of their spheres of influence. In 1277 the Archbishops managed to defeat a large confederation of Westphalian and Lower Rhenish opponents, but further action in 1288 forced the Archbishops to abandon intentions on much of the greater territory of Westphalia. The annexation of Werl-Arnsberg in 1368 united the territories of the north and south of the Sauerland.
The Archbishop Frederick of Saarwerden began a hopeless campaign to maintain Colognian rights in Marck, and in 1392 was forced to abandon them. His successor, Theodoric II of Moers witnessed the last attempts by Cologne to gain rulership in Westphalia by attempting to break the powerful positions of Cleves and Marck. The financial burden placed upon the knights and cities of the Duchy of Westphalia led them into union in 1437. Cologne made peace with Cleves in 1441 (which led to Soest recognising Colognian supremacy in 1444 in the Soester Feud). Peace with Marck was made in 1445 which witnessed territorial concessions from both sides.
After the Soester Feud, the city of Soest remained part of the Duchy of Cleves. Starting from 1463, the league of knights and cities in Westphalia began a long and bitter struggle against the Archbishops. During the reign of Archbishop Herman V of Wied (1515 - 1546), the Reformation arrived in Westphalia. Eventually the Reformation was suppressed, but during the reign of Archbishop Gebhard II of Truchsess Waldburg (1577 - 1583) the Reformation returned and he was forced to attend to Westphalia in 1582 where several knights and cities had adopted the new doctrines. The newly elected Archbishop Ernest of Bavaria (1583 - 1612) and his brother Ferdinand of Bavaria managed to regain the Duchy for the Archbishopric at the beginning of the Cologne War in 1583, and Protestantism survived only on the border region of Waldeck and Hesse. The Duchy of Westphalia was again confirmed the hereditary territory of the Archbishops in 1590.
Like most other territories of Germany, Westphalia suffered during the Thirty Years' War. In 1794 the Archbishops relocated to Westphalia after the French had annexed the territories west of the Rhine River. In the secularisation of 1803 the Duchy of Westphalia passed to Hesse-Darmstadt.
In 1807 the newly created Kingdom of Westphalia was created although it did not include the Duchy and had its' capital in Hesse at Cassel. The Congress of Vienna awarded the Duchy of Westphalia to Prussia in exchange for important lands west of the Rhine, and the Duchy was incorporated into the Province of Westphalia in 1815.