Timeline

Heritage classified

Key figures

Origin and history

Philippe Auguste's enclosure is an urban fortification system built in Paris between the late 12th and early 13th centuries (1190–1215). Commanded by King Philippe Auguste before his departure for the third crusade, this stone wall was designed to protect the capital from the attacks of the Plantagenets, whose territories then extended from Normandy to the Pyrenees. Unlike later fortifications, it was without an external ditch, with the Parisian roads nearby. Its line, 2,535 m long on the left bank and 2,850 m on the right bank, covered 253 hectares and housed approximately 50,000 inhabitants at the end of the king's reign.

The construction began with the right bank (1190–1209), more exposed to threats, before extending to the left bank (1200–1215). The financing, estimated at more than 15,000 pounds, was partially provided by the Royal Treasury and the Parisian bourgeois. The enclosure included 73 semi-cylindrical towers, 14 main doors, and later added poternes to meet urban growth. Its layout had a lasting impact on the Parisian old-school network, with streets such as the Fossés-Saint-Bernard or Monsieur-le-Prince traced over old ditches.

In the 14th century, despite the construction of Charles V's enclosure (right bank only), Philippe Auguste's was preserved and strengthened: dug ditches, barbacans added to the doors, and built round roads. However, from the 16th century onwards, the doors were demolished (1533 under Francis I) and the walls were gradually absorbed by urbanization. In the 17th century, the ditches, which became unsanitary, were filled or transformed into covered sewers. Today, some 20 classified remains remain, often integrated into private properties, as at the 11 quay in Conti (6th arrondissement).

The enclosure played a major role in the development of Paris, framing its medieval expansion and structuring neighborhoods such as the Champeaux (future Halles) or the village Sainte-Geneviève. It also symbolizes the centralization of royal power, with Paris becoming the principal residence of Capetians and a cultural centre (colleges, University). Its urban heritage remains visible in the oblique orientation of some streets (e.g., rue Jean-Jacques-Rousseau) or the alignments of properties along the old route.

Among the remarkable elements, four 25 m high river towers (turn of the Coin, tower of Nesle, tower Barbeau, tournelle des Bernardins) allowed to stretch chains across the Seine to block navigation. The gates, like Saint-Honoré or Saint-Antoine, were quadrangular chestnuts flanked by towers. The most accessible remains include a courtyard of 60 m rue des Jardins-Saint-Paul (4th arr.) and bases of visible towers rue du Cardinal-Lemoine (5th arr.) or in the courtyard of Crédit municipal (4th arr.).

External links