Best castles in Flemish Brabant, a province surrounding Brussels, offers a rich collection of historic castles. These architectural sites provide insights into Belgium's past, set within diverse landscapes. The region features a variety of castles, from medieval fortresses to renovated estates, often integrated into extensive parks and natural domains.
Last updated: May 1, 2026
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Two important lordships formed the basis of the current Hoeilaart: the lordship of Ter Heyde south of the IJse on the one hand, and the lordship of Holaer or Hoeilaart north of the IJse on the other. Here once stood the castle of the Ter Heyde lordship from the fifteenth century. That lordship ceased to exist after the abolition of the ancien régime. The current castle was built in 1858 on the orders of baron Jean de Man d’Attenrode (mayor of Hoeilaart from 1854-1878) and his wife Maria Carolina d’Ormesson. It is therefore not a remnant of the old lordship. BUT: the chapel and former closed farm next to it are. This building has now, as others have mentioned, been given a different function and dominates the view in the park. Inventory of Immovable Heritage: Kasteel van Hoeilaart, https://id.erfgoed.net/erfgoedobjecten/39785
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Once a sturdy motte castle from the 11th century, Het Steen grew into a beautiful Renaissance castle that played a key role in the defense of Brabant against the Mechelaars for centuries. The castle is picturesquely situated in a meander of the Barebeek, surrounded by old moats and close to the Zenne, and breathes history - from knightly battles to Spanish garrisons. The most famous resident was Peter Paul Rubens, who spent his last summers here, painted, partied with artist friends such as Van Dyck and Teniers, and immortalized the surrounding nature on canvas.
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The core of Horst Castle probably dates back to the 13th century and is characterised by a square keep. The keep probably belonged to the oldest core that was further expanded into a fortified castle in the 15th century. During the troubles under Maximilian of Austria in 1489, the castle of Horst was taken by the people of Leuven and set on fire. According to literary sources, only the keep, part of the entrance gate and a defensive wall remained standing. The residential and east wing were renovated and expanded in the 16th century. The round tower also dates from this period. The outer wall was provided with a rectangular bay window. The castle lost its military character and became more of a pleasant residential area with a view of the moat, the ponds and the inner courtyard. Brick construction with sandstone layers characterise these buildings. In 1587, however, the castle was set on fire again during the raids of the Geuzen. It was not until the beginning of the 17th century that restoration work began. It is difficult to deduce from the available sources to what extent this involved restoration or an embellishing conversion of the castle complex. Presumably nothing changed in the internal structure, but only after the structurally necessary repairs were the interiors completely refinished. Maria-Anna Van den Tympel had a new chapel built against the keep in the 17th century. At the beginning of the 19th century, the complex must have been damaged by plundering and neglect, and it is possible that it also suffered from plundering during the Brabant Revolution of 1830. Around 1850, the castle must have been habitable again, but the castle buildings only served as a farm. In the land registry, the site around the castle is called "De Notelaren Boomgaerd". Around that time, the most dilapidated part must have been demolished, namely the southern part and the superstructure of the gate. The rest of the complex was probably restored with reused demolition material and in traditional style. The castle was divided in 1880, with one part being registered as a school house. In 1897, a further division followed, with two plots being designated as houses. Several restoration campaigns followed in the 20th century. Inventory of Immovable Heritage: Horst Castle, https://id.erfgoed.net/erfgoedobjecten/43619
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Since December, there has been a spire on the castle again after the unstable spire was removed more than four years ago and could be viewed on a wooden platform in the pond. Now it is back. And the other works are also progressing quickly. More about the replaced spire on https://www.vrt.be/vrtnws/nl/2024/12/10/torenspits-staat-weer-op-kasteel-van-horst-holsbeek/
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The Donjon Ter Heyden, also known as the tower of Ter Heyden, is a residential tower in the Belgian town of Rotselaar (province of Flemish Brabant) from the mid-fourteenth century. The donjon was built between 1350 and 1363 by order of Gerard van der Heyden, the then bailiff of the Duchy of Brabant, when he acquired the status and funds through a marriage with a noblewoman to erect a building of such calibre.
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superb, well-maintained and very varied park
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For a deep dive into medieval military architecture, Horst Castle stands out as an idyllic moated castle from the 13th century. Another impressive and well-preserved medieval moated castle is Beersel Castle, dating back to the 14th century, known for its sturdy fortifications.
Yes, Gaasbeek Castle, often described as a 'fairy-tale castle,' reopened to visitors in March 2024 after extensive renovations. It now showcases a wide range of restored rooms and corridors, offering a glimpse into its historical grandeur.
Several castles are set within beautiful domains. Groenenberg Castle is located within a 45-hectare English landscape park, perfect for leisurely walks. Similarly, Bouchout Castle is situated within the expansive Meise Botanic Garden, offering a diverse experience combining history with nature. Groot-Bijgaarden Castle is also renowned for its beautiful spring garden.
Many castles in Flemish Brabant offer family-friendly experiences. The Provincial Domain of Huizingen, home to Huizingen Castle, features a park with walking trails, a boating lake, and a small animal park, making it ideal for families. Ter Rijst Castle Estate also offers a beautiful park environment with ponds and trails suitable for families.
The region around the castles offers diverse outdoor activities. You can find numerous road cycling routes, such as the 'Dijle Valley Route' or the 'Voervalleiroute,' which can be explored via the Road Cycling Routes in Flemish Brabant guide. For those who prefer gravel biking, routes like the 'Flemish Brabant loop from Sint-Pieters-Leeuw' are available in the Gravel biking in Flemish Brabant guide. There are also mountain hikes, including trails in the Sonian Forest, detailed in the Mountain Hikes in Flemish Brabant guide.
Het Steen, also known as Rubens Castle, was the summer residence of the renowned painter Peter Paul Rubens. He spent his last summers there, finding inspiration in its picturesque setting in a meander of the Barebeek, surrounded by old moats.
Beersel Castle is noted for its easy accessibility by public transport from Brussels, making it a convenient option for visitors without a car.
Yes, some castles offer on-site dining. Horst Castle features the Brasserie Wagenhuis, ideal for refreshments. Huizingen Castle itself now functions as a restaurant and event venue. Additionally, Boetfort Castle has been repurposed into a luxurious spa, Thermae Boetfort, where the main castle building houses the spa's restaurant.
At Horst Castle, dogs are allowed on the castle grounds, though not inside the castle itself. Many of the surrounding park domains also welcome dogs on leash, offering pleasant walks.
The spring and summer months are generally ideal for visiting, especially if you wish to enjoy the extensive parks and gardens. Groot-Bijgaarden Castle, for instance, is particularly renowned for its beautiful spring garden. However, the historical significance of these sites makes them engaging year-round.
Yes, some castles have been adapted for unique experiences. Boetfort Castle has been transformed into Thermae Boetfort, a luxurious spa. Diepenstyn Castle is home to Palm Breweries and offers guided tours of the brewery, including interactions with Brabant horses, providing a distinct blend of history and local industry.
Horst Castle, nestled between the hills of Hageland, offers picturesque views, especially from a distance across its impressive moat. Groenenberg Castle is also situated in a beautiful domain with a high point offering views, and its park is known for striking nature collections.


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