On 1 January 2006 the municipality had 7,487 inhabitants. The total area is 50.81 km2, giving a population density of 147 inhabitants per km2.
The municipality consists of the following districts: Malèves-Sainte-Marie-Wastines, Orbais, Thorembais-les-Béguines, and Thorembais-Saint-Trond.
History
In Roman times, Perwez was on the Roman road from Bavay to Cologne.[2] This resulted in three tumuli which are no longer visible today. In 1977 a tomb with several Roman artefacts was discovered near the farm of Long Pont.[3]
In Medieval times, Perwez often suffered from its position near the border between the Duchy of Brabant and the Prince-Bishopric of Liège.[4] Perwez developed around its church and its castle, which was demolished somewhat before 1870. The main source of wealth for Perwez was its market, which relied on agricultural products.[5]
In the modern era (1500-1800) Perwez got a cloth hall and a wheats exchange halle aux grains. In 1511 it got an annual October market. In 1577 troops paid by the rebellious States General camped near Perwez.[6]
During the 19th century Perwez saw quite some industrialization based on agriculture. In 1870 there were two watermills, two windmills, two tanneries, three breweries and a râperie, linked to a central sugar factory.
The râperie was a very significant enterprise, which had 175 employees.[8] It extracted juice from sugar beet, which was then sent by pipeline to the Wanze Sugar Factory. It was located on the Avenue de Rosaraie and closed down in 1959. Some remaining buildings are now used by a high-end restaurant.
During World War II Perwez suffered from an accidental disaster. On 13 May 1940, a French ammunition storage or mine in the center of town was hit and exploded. There were 33 casualties. The French then ignited other mines, leading to much destruction. On 6 September 1944 Perwez was liberated by the American 2nd Armored Division.[9]