Origin of the House: feud between Dampierre and Avesnes
Baldwin, the first emperor of the Latin Empire of Constantinople, was as Baldwin IX Count of Flanders and as Baldwin VI Count of Hainaut. Baldwin had only daughters and was in turn succeeded by his daughters Joan (reigned 1205–1244) and Margaret II (reigned 1244–1280).
In 1212 Margaret II married Bouchard d'Avesnes, a prominent Hainaut nobleman. This was apparently a love match, though it was approved by Margaret's sister Joan, who had herself recently married. The two sisters subsequently had a falling-out over Margaret's share of their inheritance, which led Joan to attempt to get Margaret's marriage dissolved. She alleged that the marriage was invalid, and without much inspection of the facts of the case Pope Innocent III condemned the marriage, though he did not formally annul it.
Bourchard and Margaret continued as a married couple, having 3 children, as their conflict with Joan grew violent and Bouchard was captured and imprisoned in 1219. He was released in 1221 on the condition that the couple separate and that Bouchard get absolution from the pope. While he was in Rome, Joan convinced Margaret to remarry, this time to William II of Dampierre, a nobleman from Champagne. From this marriage Margaret had two sons: William II, Count of Flanders and Guy of Dampierre.
This situation caused something of a scandal, for the marriage was possibly bigamous, and violated the church's strictures on consanguinity as well. The disputes regarding the validity of the two marriages and the legitimacy of her children by each husband continued for decades, becoming entangled in the politics of the Holy Roman Empire and resulting in the long War of the Succession of Flanders and Hainault.
In 1246 king Louis IX of France, acting as an arbitrator, gave the right to inherit Flanders to the Dampierre children, and the rights to Hainaut to the Avesnes children. This would seem to have settled the matter, but in 1253 problems arose again. The eldest son, John I of Avesnes, who was uneasy about his rights, convinced William of Holland, the German king recognized by the pro-papal forces, to seize Hainaut and the parts of Flanders which were within the bounds of the empire. William of Holland was theoretically, as king, overlord for these territories, and also John's brother-in-law. A civil war followed, which ended when the Avesnes forces defeated and imprisoned the Dampierres at the Battle of West-Capelle of 4 July 1253, after which John I of Avesnes was able to force Guy of Dampierre and his mother to respect the division of Louis and grant him Hainault.
Margaret did not rest in her defeat and did not recognise herself as overcome. She instead granted Hainault to Charles of Anjou, the brother of King Louis, who had recently returned from the crusade. Charles took up her cause and warred with John I of Avesnes, but failed to take Valenciennes and just missed being killed in a skirmish. When Louis returned in 1254, he reaffirmed his earlier arbitration and ordered his brother to get out of the conflict. Charles returned to Provence. With this second arbitration of the holy king, the conflict closed and John I of Avesnes was secure in Hainault.
The following decades saw further strife between the Dampierres and the Avesnes, who by the start of the 14th century had also inherited the County of Holland and Zeeland.
The count of Flanders was the ruler or sub-ruler of the county of Flanders, beginning in the 9th century. Later, the title would be held for a time, by the rulers of the Holy Roman Empire and Spain. During the French Revolution, in 1790, the county of Flanders was annexed to France and ceased to exist. In the 19th century, the title was appropriated by Belgium and granted twice to younger sons of Belgian kings. The most recent holder died in 1983.
Joan, often called Joan of Constantinople, ruled as Countess of Flanders and Hainaut from 1205 until her death. She was the elder daughter of Baldwin IX, Count of Flanders and Hainaut, and Marie of Champagne.
Margaret, often called Margaret of Constantinople, ruled as Countess of Flanders during 1244–1278 and Countess of Hainaut during 1244–1253 and 1257–1280. She was the younger daughter of Baldwin IX, Count of Flanders and Hainaut, and Marie of Champagne.
Margaret II of Avesnes was Countess of Hainaut and Countess of Holland from 1345 to 1356. She was Holy Roman Empress and Queen of Germany by marriage to Holy Roman Emperor Louis IV the Bavarian.
The County of Hainaut, sometimes spelled Hainault, was a territorial lordship within the medieval Holy Roman Empire that straddled the present-day border of Belgium and France. Its most important towns included Mons, now in Belgium, and Valenciennes, now in France.
Isabella of Hainault was a Queen of France as the first wife of King Philip II. She was also formally ruling Countess of Artois de jure between 1180 and 1190.
John of Avesnes was the count of Hainaut from 1246 to his death.
Adelaide of Holland, was a Countess of Hainaut by marriage to John I, Count of Hainaut. She acted as the regent of the County of Holland during the minority of her nephew Count Floris V between 1256 and 1263.
John II was Count of Hainaut, Holland, and Zeeland.
William the Good was count of Hainaut, Avesnes, Holland, and Zeeland from 1304 to his death.
Guy of Dampierre was the Count of Flanders (1251–1305) and Marquis of Namur (1264–1305). He was a prisoner of the French when his Flemings defeated the latter at the Battle of the Golden Spurs in 1302.
Joan of Valois was a Countess consort of Hainaut, Holland, and Zeeland, by marriage to William I, Count of Hainaut. She acted as regent of Hainaut and Holland several times during the absence of her spouse, and she also acted as a political mediator.
Le Quesnoy is a commune and small town in the east of the Nord department of northern France. It was part of the historical province of French Hainaut. It is known for its fortifications, dating from the 16th, 17th and 18th centuries. It had an significant shoemaking industry before the late 1940s, followed by a chemical factory and dairy, giving way to its weekly market, tourism, local commuting to elsewhere such as Valenciennes and local shops.
The War of the Flemish Succession was a series of feudal conflicts in the mid-thirteenth century between the children of Margaret II, Countess of Flanders. They concerned the succession to the countship of two counties, one a fief of the King of France (Flanders) and one a fief of the King of Germany (Hainault).
William III was the lord of Dampierre from 1231 and count of Flanders from 1247 until his death. He was the son of William II of Dampierre and Margaret II of Flanders.
Burchard IV or Bouchard IV (1182–1244) was the lord of Avesnes and Étrœungt. He was the son of James of Avesnes and Adela of Guise and brother of Walter, Count of Blois.
The Count of Hainaut was the ruler of the county of Hainaut, a historical region in the Low Countries. In English-language historical sources, the title is often given the older spelling Hainault.
The House of Flanders, also called the Baldwins, was a medieval ruling family of Frankish origin that was founded by Baldwin Iron Arm, son-in-law of Charles the Bald. The House of Flanders was the first dynasty to transform a county function of the Carolingian Empire into a hereditary fiefdom, the County of Flanders, falling under West Francia, created by the Treaty of Verdun in 843.
The House of Dampierre played an important role during the Middle Ages. Named after Dampierre, in the Champagne region, where members first became prominent, members of the family were later Count of Flanders, Count of Nevers, Counts and Dukes of Rethel, Count of Artois and Count of Franche-Comté.
Baldwin of Avesnes was a son of Bouchard IV of Avesnes and his wife, Margaret II of Flanders. His parents' marriage was later declared illegal, because his father had already received minor orders. Baldwin was later declared legitimate by the pope, at the instigation of King Louis IX of France. In 1246, Baldwin received Beaumont as an apanage.
