Itterbeek used to be part of the allodium of Sint-Pieters-Leeuw. Property owned under allodial title is referred to as allodial land, allodium, or an allod. The present village was established in the 8th century as a Frankish allodium. More likely, however, seems that it was erected by the allodium of the Abenbergers. The basic unit of estate organization was mentioned as "praedium" or "allodium" in medieval documents. One of them is the allodium Heerlen, in the bishopry of Liege. Historically, much of land was uninhabited and could, therefore, be held "in allodium". It is described as the "allodium de Muha" [or "Musal"] "et de Waleve".