Archbishops · Archbishopric of Cologne · as at first light, 1 January 1200

Westphalia

After Henry the Lion's fall, Barbarossa's Gelnhausen charter of 13 April 1180 gave the archbishop of Cologne ducal power in Westphalia and in the part of Engern reaching to the Weser (the dioceses of Cologne and Paderborn), as a fief of the banner.

The charter set no borders and listed no rights: in practice the duchy means a claim to lead the counts in war, keep the peace, license castles and judge, together with the archbishop's own scattered towns and estates. On the ground in 1200 the real lordship is Soest and a string of towns, castles and courts in the Hellweg and the Sauerland; the rest is counts' land over which the duke's rights are asserted more than exercised.

Who holds it

Name
Adolf of Altena (Adolf I)
Title
Archbishop of Cologne as duke in Westphalia and Engern
Since
1193 (the duchy belongs to the see since 13 April 1180)
Confidence
high

See the Cologne card. Adolf's own family, the counts of Altena and their Isenberg branch, are among the strongest lords in the south-west of the duchy, which gives him a hold there that his predecessors lacked.

What it holds

  • Soest: the archbishop's chief town in Westphalia, with his palace, walled about 1180, with salt springs and the oldest written town law in the German lands (the citizens will pull down his new palace in 1225)
  • Werl and Hachen: bought from the counts of Werl in 1102; salt at Werl (town charter 1218)
  • Medebach: a market town under the archbishop, with privileges said to date from 1144 and 1165 (both charters suspected); its traders reach Lübeck by 1183
  • Attendorn: the archbishop's mint by about 1200 (town charter 1222)
  • Old Cologne estates held by about 1100: Menden, Belecke, Olpe, Recklinghausen and others; at Recklinghausen a Cologne court district (the later Vest) is forming after 1180 (first named 1228)
  • Volmarstein: archiepiscopal castle on the Ruhr with its county (with Schwelm and Hagen); the date it came wholly to Cologne is not pinned
  • Rüthen: lands bought from 1180 onward, where Adolf will found a town on 29 September 1200
  • Arnsberg: overlordship over the counts of Arnsberg, forced when Rainald of Dassel retook the town in 1164 (the archbishops had earlier taken half their county)
  • Ducal rights claimed over the counts and lords between the Rhine and the Weser in the dioceses of Cologne and Paderborn: Arnsberg, Altena and Isenberg, Lippe and the others, and over the bishop of Paderborn's lands

How it was acquired

Gelnhausen charter of 13 April 1180 to Philip of Heinsberg, who had led the war against Henry the Lion in Westphalia (1178-1181). Estates: Soest and the other old properties by about 1100; Werl and Hachen bought from the counts of Werl in 1102; Arnsberg's overlordship forced in 1164; Philip of Heinsberg bought allods and castles across the region in the 1180s, and Rüthen's lands were bought after 1180.

How things stand that morning

Real lordship around Soest and in the Sauerland towns; elsewhere the duchy is a title Adolf uses when he can. His family ties to Altena and Isenberg strengthen him in the south-west. The towns he and his successors found (Rüthen 1200, Werl 1218, Attendorn 1222, Brilon about 1220) are the way the title is being turned into a territory.

Wealth

Salt at Soest and Werl; the Hellweg trade road through Soest; the long-distance trade of Medebach and Soest merchants; the Attendorn mint.

Threats

  • Counts who refuse the duke's summons
  • Paderborn and Münster resisting ducal claims over their lands
  • The citizens of Soest, rich and walled

Advocates and rivals

The counts of Arnsberg (Cologne's unwilling vassals), the counts of Altena and Isenberg (Adolf's kin; the Isenberg branch holds the advocacy of Essen), the counts of Tecklenburg (advocates of Münster and Osnabrück), the lords of Lippe, the counts of Ravensberg, and the bishops of Paderborn and Münster, who accept no duke over their churches. Paderborn in particular watches Cologne expand at its expense.

What the year holds

What happened next, if nothing in play changes it. Each event carries what it depends on and what would stop it.

  1. 29 September 1200Archbishop Adolf founds the town of Rüthen on lands bought since 1180, taking in an older manor settlement of the counts of Arnsberg: a fortified market facing Arnsberg and Lippe.Depends on: Adolf's control of the area and the means to build. Stopped by: War absorbing his resources, or a quarrel with the count of Arnsberg over the site.

Places of note

  • Rüthen: Town founded by Adolf on 29 September 1200 (likely course)
  • Gelnhausen: Where the duchy was granted, 13 April 1180
  • Arnsberg: Seat of the counts of Arnsberg, Cologne's vassals since 1164

Where the sources disagree

Evidence: The 1180 grant and the archbishop's main Westphalian towns are well attested; the duke's rights were undefined by design, so the claimed area is drawn only roughly, following the dioceses of Cologne (its Westphalian part) and Paderborn.

On the map: The held parts are the archbishop's own towns and estates, drawn small. The hatched claim is a rough outline of the two dioceses named in the 1180 grant and should be read as rights over other lords, not as a country the archbishop ruled. Paderborn's own lands lie inside it (see the Paderborn card).

Primary sources for Cologne

Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.

2 more in the sources library for The Rhineland, the Low Countries and the Swiss Lands.

Sources and studies

  1. Herzogtum Westfalen (de.wikipedia)
  2. Philipp von Heinsberg (NDB, deutsche-biographie.de)
  3. Soest (de.wikipedia)
  4. Werl (de.wikipedia)
  5. Medebach (de.wikipedia)
  6. Attendorn (de.wikipedia)
  7. Rüthen (de.wikipedia)
  8. Vest Recklinghausen (de.wikipedia)

Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.