Braine-l'Alleud

Middle Ages

Several archaeological finds point to prehistoric settlements in this area. The first historical mention of a parish on Braine-l'Alleud's current territory, then called Dudinsart, dates from 1131, date at which Godfrey I, Duke of Brabant ceded it to the Abbey of Gembloux. The Duke, however, still owned exempt land (or franchise) on this territory, as specified in a legal document by Henry I dated 1197. The name of the municipality changed to the current one, derived from "Braine", former name of the stream that crosses its territory (now called the "Hain"), and "alleu(d)", a medieval French word designating exempt land (English allod). The latter name was added to the former to distinguish this community from two neighbouring ones also called Braine.

At the beginning, the franchise might not have been much more than a right to local administration. By 1489, however, the local lord enjoyed complete juridical power on its territory, which was still formally part of the fiefdom obtained from the Duke of Brabant.

Battle of Waterloo

In 1815, part of the fighting that took place at the Battle of Waterloo actually occurred on the territory of Braine-l'Alleud. The town's church of Saint-Étienne became a field hospital.