The oldest mention of this free heritage dates from the Middle Ages (mid-14th century). The Lobos heritage originally consisted of an upper court (fortified house, probably flanked by a donjon (fortified tower)), a barnyard or farm, a warande (this is a hunting estate), waters, fields, meadows and forests and fishing. The whole was surrounded by a moat and earthen wall. The domain previously had a military character and had the appearance of a small castle. This 'castellum' was located on a 'motte', an artificial height in the middle of the swampy wetland of the Zwarte Beek. The domain was originally part of the manor of Zelem, owned by the lords of Diest. These, as a reward for services rendered, removed the property from that manor and gave it away as a free heritage to the Diest knight family of the Boogaerde alias van Lobosch. They thus acquired full ownership and no longer had any obligations to the feudal lord. The first owners, the Van den Boogaerde family (14th century), sold the domain to the Vilters family (15th century). In 1465 the castle was destroyed. In the 16th century the domain was sold to the de Geloes family. They had the castle rebuilt (17th century) into an adapted residence with the necessary comfort. Parts of the moat were used to embellish the garden and are still visible today. After the death of Arnold de Geloes' wife in 1781, this branch of the family was completely extinct and there were no longer any direct heirs to the considerable estate. Ultimately, the property came into the hands of another branch of the de Geloes family and 300 years of rule over the Lobos by the noble de Geloes family came to an end. Fact: our queen Mathilde d'Udekom d'Acoz is descended from the de Geloes family and the Vilters de Lobos family.