Town · Flanders and Hainaut · as at first light, 1 January 1200

Saint-Omer

A great old trading town on the Aa, with one of the earliest merchant guilds of the north and a famous abbey (Saint-Bertin).

Part of the king's Artois from 1191, it was besieged and taken by Baldwin in 1198 and is held by him by conquest on 1 January 1200. The next day the treaty of Peronne leaves it to him.

Who holds it

Name
Baldwin IX, by conquest since 1198 (confirmed at Peronne on 2 January 1200); William V, castellan of Saint-Omer; the abbey of Saint-Bertin and the chapter of Saint-Omer
Title
Lord of the town
Confidence
high

Lord in 1200

Baldwin IX, by conquest since 1198 (confirmed at Peronne on 2 January 1200); William V, castellan of Saint-Omer; the abbey of Saint-Bertin and the chapter of Saint-Omer

How things stand that morning

Held by Baldwin since 1198; formally still royal Artois until the treaty of the next day.

Charter

Commune charter of Count William Clito, 14 April 1127, confirmed by Thierry of Alsace and later counts; the statutes of the merchant guild (about 1100).

Council

Échevins and jurés; the merchant guild.

Communities

No Jewish community is attested here in 1200; the count's Flanders had few or none. Lombard and Cahorsin moneylenders come later.

Fairs and markets

Markets; the town's merchants trade to England and Champagne.

Militia

The town militia held the walls for the king in 1198 until the surrender.

Walls and castle

Walls; the castellan's castle.

Trade and crafts

Cloth, wool, wine; river trade by the Aa to Gravelines and the sea; market gardens in the marsh.

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. 2 January 1200Peronne leaves Saint-Omer to the count.Depends on: The peace. Stopped by: A rupture.

Where the sources disagree

Evidence: The 1127 charter and the 1198 conquest are sure.

On the map: The tierra is the town's own banlieue or district, drawn from modern municipal units.

Primary sources for Flanders

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.

  • Chronicle of Alberic of Trois-Fontaines, Alberic of Trois-Fontaines (about 1227 to 1241, at the Cistercian abbey of Trois-Fontaines in Champagne). The widest net of any Latin chronicle for 1200, compiled from dozens of sources, many now lost. Read online
  • Chronicle of Andres, William of Andres (about 1220 to 1234). The chronicle and cartulary of a small abbey between Guines and Ardres, near the border of Flanders and Boulogne. Read online
  • Chronicle of Hainaut, Gislebert of Mons (about 1195 to 1196). Ends in 1195, so it has no 1200 entries, but it is the indispensable background for Flanders and Hainaut: the career of Count Baldwin V of Hainaut (VIII of Flanders), his union of the two counties, the settlement with Philip over Artois, the rights, castles, fiefs and vassals of Hainaut listed by a man who ran its chancery, and the youth of Baldwin IX, who held both counties in 1200. Read online
  • Chronicle of Robert of Auxerre, Robert of Auxerre (Robert of Saint-Marien) (about 1190 to 1211; continued at Saint-Marien to 1227). A universal chronicle whose last twenty years are contemporary and well informed from Burgundy and the Auxerrois. Read online
  • Universal Chronicle of the Anonymous of Laon, Anonymous (an English-born canon of Laon) (about 1219). A Picard chronicle whose author had lived in England and keeps an eye on both kingdoms. Read online
  • Annals of Egmond (12th century to about 1205). The house annals of Egmond, the counts of Holland's abbey, and the main native source for Holland around 1200. Read online
  • Chronicle of Roger of Howden, Roger of Howden (about 1192 to 1201). The fullest single narrative for the year. Read online
  • Deeds of Philip Augustus, Rigord (about 1186 to 1206, in stages). The French court's own chronicle for the year, from the monk of Saint-Denis who called himself the king's chronographer. Read online

8 more in the sources library for France and Iberia.

Sources and studies

  1. Comte d'Artois (French Wikipedia, via mirror)
  2. Saint-Omer (English Wikipedia)

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