|Count of Ravensberg|
|Noble family||House of Calvelage-Ravensberg|
|Spouse(s)||Margaret of Berg-Windeck|
|Father||Otto III of Ravensberg|
|Mother||Hedwig of Lippe|
Otto IV, Count of Ravensberg (c. 1276– 1328) was a German nobleman. He was the ruling Count of Ravensberg from 1306 until his death.
The County of Ravensberg was a historical county of the Holy Roman Empire. Its territory was in present-day eastern Westphalia, Germany at the foot of the Osning or Teutoburg Forest.
Otto was the fifth child of Count Otto III and his wife Hedwig of Lippe (c. 1238– 5 March 1315), daughter of Bernard III, Lord of Lippe.
Otto III of Ravensberg was Count of Ravensberg from 1249 until his death.
Bernard III, Lord of Lippe was a German nobleman. He was the ruling Lord of Lippe from 1229 until his death.
In 1313, Otto IV married Margaret of Berg-Windeck. Together, they had two daughters:
Margaret of Berg-Windeck was a German noblewoman.
William II, Duke of Brunswick-Lüneburg was the Prince of Lüneburg from 1330 to 1369.
Margaret of Ravensberg was the daughter and heiress of Otto IV, Count of Ravensberg and Margaret of Berg-Windeck.
Gerhard VI of Jülich, Count of Berg and Ravensberg was the son of William V, Duke of Jülich and Joanna of Hainaut.
The County of Mark was a county and state of the Holy Roman Empire in the Lower Rhenish–Westphalian Circle. It lay on both sides of the Ruhr river along the Volme and Lenne rivers.
John III the Peaceful, Duke of Cleves and Count of Mark was a son of John II, Duke of Cleves and Mathilde of Hesse, daughter of Henry III, Landgrave of Upper Hesse.
La Marck, original German name von der Mar(c)k, was a noble family, which from about 1200 appeared as the Counts of Mark.
William V, Duke of Jülich was a German nobleman. Some authors call him William I, because he was the first Duke of Jülich; the earlier Williams had been Count of Jülich. Other authors call the subject of this article "William VI"; they count the son and co-ruler of William IV as William V.
Adolph III of the Marck was the Bishop of Münster from 1357 until 1363, the Archbishop of Cologne in 1363, the Count of Cleves from 1368 until 1394, and the Count of Mark from 1391 until 1393.
Altenberg Abbey is a former Cistercian monastery in Altenberg, now a part of Odenthal in the Bergisches Land, North Rhine-Westphalia, Germany.
William VIII of Jülich, Count of Ravensberg was the youngest son of William VII of Jülich, 1st Duke of Berg and Anna of the Palatinate.
William VII of Jülich, 1st Duke of Berg was born in Jülich, as the son of Gerhard VI of Jülich, Count of Berg and Ravensberg, and Margaret, daughter and heiress of Otto IV, Count of Ravensberg, and Margaret of Berg.
Henry of Berg, Lord of Windeck was the son of Adolf VII of Berg and Margaret of Hochstaden. He was the younger brother of Adolf VIII of Berg and William I of Berg.
Sibylle of Brandenburg was a Princess of Brandenburg by birth and by marriage Duchess of Jülich and Duchess of Berg.
Simon I, Lord of Lippe ruled Lippe from 1273 until his death in 1344.
Bernhard IV, Lord of Lippe was a ruling Lord of Lippe.
Frederick III of Moers was a German nobleman. He was Count of Moers by inheritance and Count of Saarwerden by jure uxoris.
The Altenberger Dom is the former abbey church of Altenberg Abbey which was built from 1259 in Gothic style by Cistercians. Listed as a cultural heritage, it is located in Altenberg, now part of Odenthal in the Rheinisch-Bergischer Kreis, North Rhine-Westphalia, Germany. Until 1511, the church was the burial site of counts and dukes of Berg and the dukes of Jülich-Berg.
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