Town · County of Champagne · as at first light, 1 January 1200

Lagny

Lagny on the Marne is the westernmost of the fair towns, a day from Paris, where the cycle of the Champagne fairs opens each New Year.

The town grew round the Benedictine abbey of Saint-Pierre, which created the fair; the counts of Champagne have been its lords and protectors since the 1020s.

Who holds it

Name
The abbey of Saint-Pierre of Lagny, under the lordship and protection of Count Theobald III
Title
Lord of the town
Since
The counts have held the lordship over the monastic town since about 1023
Confidence
medium

French Wikipedia: the abbey created and runs the fair of the Holy Innocents from the eleventh century; Count Theobald II (died 1152) is buried in the abbey church.

Lord in 1200

The abbot of Saint-Pierre as lord of the town, under the count of Champagne, who holds the lordship over it and guards the fair.

How things stand that morning

At peace; the fair opens tomorrow.

Threats

  • Paris's pull and the king's suspicion of any fortification here

Charter

None known for 1200.

Communities

The abbey's monks; merchants in fair time.

Fairs and markets

The fair of Lagny, the first of the yearly cycle, opens on 2 January (the day after the game starts) and runs into February.

Militia

Not established.

Walls and castle

No walls in 1200: the abbey walls the town only in the thirteenth century, and Philip Augustus forbade the counts to fortify it (date not pinned).

Trade and crafts

The fair trade; river traffic on the Marne to Paris.

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 1200Lagny fair opens.Depends on: Custom. Stopped by: War or interdict.

Places of note

  • Abbey of Saint-Pierre: Lord of the town; burial place of Theobald II.

Where the sources disagree

Evidence: Fair and lordship well known; institutions in 1200 not pinned.

On the map: Town and near villages.

Primary sources for Champagne

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 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
  • 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
  • Deeds of Philip Augustus; The Philippide, William the Breton (Guillaume le Breton) (Gesta about 1214 to 1220; Philippide 1214 to 1224). William abridged Rigord for the years before 1207 and then continued him, so for 1200 the Gesta is a shortened Rigord with a few added touches: the Le Goulet settlement, Blanche's marriage, and the interdict. Read online
  • The Conquest of Constantinople (Villehardouin), Geoffrey of Villehardouin (about 1207 to 1213). Opens with the preaching of Fulk of Neuilly and the tournament at Ecry (28 November 1199) where Theobald III of Champagne and Louis of Blois took the cross, then the taking of the cross by Baldwin of Flanders, Hugh of Saint-Pol, Geoffrey of Perche and others through early 1200, the assemblies at Soissons and Compiegne in 1200, and the six envoys sent to Venice in the winter of 1200 to 1201. Read online
  • The Conquest of Constantinople, Robert de Clari, knight of Picardy (about 1205 to 1216). A rank-and-file crusader's account that begins with the preaching of the crusade and the taking of the cross in 1199 to 1200 by the counts of Flanders, Blois and Champagne and by the Picard lords, among them Peter of Amiens, Robert's own lord, then the negotiations with Venice. Read online

3 more in the sources library for France and Iberia.

Sources and studies

  1. Lagny-sur-Marne (fr.wikipedia)
  2. Champagne fairs (en.wikipedia)

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