Modave is a municipality of Belgium. It lies in the country's Walloon Region and Province of Liege. On January 1, 2006, Modave had a total population of 3,722. The total area is 40.37 km² which gives a population density of 92 inhabitants per km².
The municipality consists of the following sub-municipalities: Modave proper, Outrelouxhe, Strée, and Vierset-Barse.
The Château des Comtes de Marchin or Modave Castle is situated near the village of Modave. Rennequin Sualem built here what became the model for the famous Machine de Marly, which he invented.
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