The Treaty of Pont-à-Vendin was a treaty signed on 25 February 1212 at Pont-à-Vendin between king

Philip II of France Philip II (21 August 1165 – 14 July 1223), byname Philip Augustus (french: Philippe Auguste), was King of France from 1180 to 1223. His predecessors had been known as kings of the Franks, but from 1190 onward, Philip became the first French ...

and the count (''

iure uxoris ''Jure uxoris'' (a Latin phrase meaning "by right of (his) wife"), citing . describes a title of nobility used by a man because his wife holds the office or title ''suo jure'' ("in her own right"). Similarly, the husband of an heiress could becom ...

'') and countess of Flanders.

Background

After count

Baldwin IX of Flanders Baldwin I ( nl, Boudewijn; french: Baudouin; July 1172 – ) was the first Emperor of the Latin Empire of Constantinople; Count of Flanders (as Baldwin IX) from 1194 to 1205 and Count of Hainaut (as Baldwin VI) from 1195-1205. Baldwin was on ...

, who had been able to conclude the for the French disadvantageous peace of Péronne, disappeared under mysterious circumstances when he undertook in his capacity as emperor of the

Latin Empire The Latin Empire, also referred to as the Latin Empire of Constantinople, was a feudal Crusader state founded by the leaders of the Fourth Crusade on lands captured from the Byzantine Empire. The Latin Empire was intended to replace the Byzanti ...

an expedition against the

Bulgarians Bulgarians ( bg, българи, Bǎlgari, ) are a nation and South Slavic ethnic group native to Bulgaria and the rest of Southeast Europe. Etymology Bulgarians derive their ethnonym from the Bulgars. Their name is not completely understo ...

in 1205, king

had his eldest daughter

Joan Joan may refer to: People and fictional characters * Joan (given name), including a list of women, men and fictional characters *:Joan of Arc, a French military heroine * Joan (surname) Weather events *Tropical Storm Joan (disambiguation), multip ...

brought over to

Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. S ...

. It was imperative for this ambitious king to have the heiress of Flanders under his control. Therefore she was betrothed to the Portuguese prince

Ferdinand Ferdinand is a Germanic name composed of the elements "protection", "peace" (PIE "to love, to make peace") or alternatively "journey, travel", Proto-Germanic , abstract noun from root "to fare, travel" (PIE , "to lead, pass over"), and "co ...

(son of Sancho I), in whom he saw an easily manipulated count of Flanders.{{Aut, D.M. Nicholas, ''Medieval Flanders'', New York - London, 1992, p
152

Treaty

In January 1212 Joan and Ferdinand tied the knot in Paris. Thereupon the young pair wished to go to the county of Flanders in order to take over the reins of power from Joan's uncle (her father's brother)

Philip Philip, also Phillip, is a male given name, derived from the Greek (''Philippos'', lit. "horse-loving" or "fond of horses"), from a compound of (''philos'', "dear", "loved", "loving") and (''hippos'', "horse"). Prominent Philips who popularize ...

margrave of Namur The County of Namur was not often an independent state, rather under the dominion of other entities like the counties of Hainaut and Flanders or the Duchy of Burgundy. Succession is from father to son, unless otherwise noted. Counts House of ...

, and temporary regent for the county. During their journey to their new county the couple was taken captive by prince Louis of France, who also took the cities of

Saint-Omer Saint-Omer (; vls, Sint-Omaars) is a commune and sub-prefecture of the Pas-de-Calais department in France. It is west-northwest of Lille on the railway to Calais, and is located in the Artois province. The town is named after Saint Audomar, ...

and

Aire-sur-la-Lys Aire-sur-la-Lys (, literally ''Aire on the Lys''; vls, Ariën-aan-de-Leie) is a commune in the Pas-de-Calais department in northern France. Geography The commune is located 16 kilometres (10 mi) southeast of Saint-Omer, at the junction ...

. Philip II let them know that he would release them once they signed a treaty in which they would cede the two captured towns to France. Eventually, on 25 February 1212, they both signed this treaty at Pont-à-Vendin, a Flemish-Artesian border town on the

Deûle The Deûle (; nl, Deule) is a river of northern France which is channeled for the main part of its course (from Lens to Lille). The upstream part is still partly free-flowing and is known as the Souchez. The Deûle flows into the Lys (right ban ...

between

Lens A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (''elements''), ...

and

Lille Lille ( , ; nl, Rijsel ; pcd, Lile; vls, Rysel) is a city in the northern part of France, in French Flanders. On the river Deûle, near France's border with Belgium, it is the capital of the Hauts-de-France Regions of France, region, the Pref ...

. Philip now thought that with Ferdinand he had appointed a count of Flanders who he could easily manipulate.

References

1210s in France 13th century in the county of Flanders Pont-à-Vendin Treaties of Flanders 1210s treaties 1212 in Europe