
The Sonian Forest or Sonian Wood ( nl, Zoniënwoud, french: Forêt de Soignes, ) is a forest at the southeast edge of
Brussels
Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
, Belgium.
The Sonian Forest was a favorite hunting ground of the
Habsburg Imperial family, and as such features prominently in some famous
Renaissance
The Renaissance ( , ) , from , with the same meanings. is a period in European history marking the transition from the Middle Ages to modernity and covering the 15th and 16th centuries, characterized by an effort to revive and surpass id ...
works of art such as the
Hunts of Maximilian tapestries in the
Louvre
The Louvre ( ), or the Louvre Museum ( ), is the world's most-visited museum, and an historic landmark in Paris, France. It is the home of some of the best-known works of art, including the ''Mona Lisa'' and the ''Venus de Milo''. A central l ...
.
The forest lies in the
Flemish
Flemish (''Vlaams'') is a Low Franconian dialect cluster of the Dutch language. It is sometimes referred to as Flemish Dutch (), Belgian Dutch ( ), or Southern Dutch (). Flemish is native to Flanders, a historical region in northern Belgium ...
municipalities of
Sint-Genesius-Rode
Sint-Genesius-Rode (; french: Rhode-Saint-Genèse, ) is a Municipalities of Belgium, municipality located in Flemish Region, Flanders, one of three regions of Belgium, in the province of Flemish Brabant. The municipality comprises the town of Sint ...
,
Hoeilaart
Hoeilaart () is a municipality in the province of Flemish Brabant, Belgium. The name Hoeilaart is of Gallic- Celtic origin, coming from "Ho-Lar," meaning a high clearing in the woods. Residents are called Hoeilanders or Doenders. The municipality ...
,
Overijse
Overijse () is a municipality in the province of Flemish Brabant, in Flanders, Belgium. It is a suburb of the wider Brussels metropolitan area. The municipality comprises the town of Overijse, and the communities of Eizer, Maleizen, Jezus-Eik, ...
, and
Tervuren
Tervuren () is a municipality in the province of Flemish Brabant, in Flanders, Belgium. The municipality comprises the villages of Duisburg, Tervuren, Vossem and Moorsel. On January 1, 2006, Tervuren had a total population of 20,636. The total ...
, in the
Brussels-Capital Region
Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
municipalities of
Uccle
Uccle () or Ukkel () is one of the 19 municipalities of the Brussels-Capital Region, Belgium. In common with all of Brussels' municipalities, it is legally bilingual (French–Dutch). It is generally considered an affluent area of the city an ...
,
Watermael-Boitsfort
Watermael-Boitsfort () or Watermaal-Bosvoorde () is a residential suburb of the city of Brussels in Belgium, and one of the 19 municipalities which form the Brussels-Capital Region.
The municipality has a total area of of which 58 percent is co ...
,
Auderghem
Auderghem (former Dutch spelling, now used in French; pronounced ) or Oudergem () is one of the 19 municipalities of the Brussels-Capital Region ( Belgium).
Located to the southeast of the region, along the Woluwe valley and at the entrance to ...
, and
Woluwe-Saint-Pierre
Woluwe-Saint-Pierre () or Sint-Pieters-Woluwe () is one of the 19 municipalities of the Brussels-Capital Region, Belgium. Located in the eastern part of the region, it is bordered by Etterbeek, Auderghem and Woluwe-Saint-Lambert, as well a ...
, and in the
Walloon towns of
La Hulpe
La Hulpe (; nl, Terhulpen, ; wa, L’ Elpe) is a municipality of Wallonia in the Belgian province of Walloon Brabant, 20 km south-east of the centre of Brussels, but only about 3 km from the edge of the Brussels-Capital Region. On Janu ...
and
Waterloo
Waterloo most commonly refers to:
* Battle of Waterloo, a battle on 18 June 1815 in which Napoleon met his final defeat
* Waterloo, Belgium, where the battle took place.
Waterloo may also refer to:
Other places
Antarctica
*King George Island (S ...
. Thus, it stretches out over the three
Belgian Regions.
It is maintained by
Flanders
Flanders (, ; Dutch: ''Vlaanderen'' ) is the Flemish-speaking northern portion of Belgium and one of the communities, regions and language areas of Belgium. However, there are several overlapping definitions, including ones related to cultu ...
(56%), the
Brussels-Capital Region
Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
(38%), and
Wallonia
Wallonia (; french: Wallonie ), or ; nl, Wallonië ; wa, Waloneye or officially the Walloon Region (french: link=no, Région wallonne),; nl, link=no, Waals gewest; wa, link=no, Redjon walone is one of the three regions of Belgium—al ...
(6%). There are some contiguous tracts of privately held forest and the ''Kapucijnenbos'', the "Capuchin Wood", which belongs to the
Royal Trust.
As of 2017, parts of the Sonian Forest have been inscribed as a
UNESCO
The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations (UN) aimed at promoting world peace and security through international cooperation in education, arts, sciences and culture. I ...
World Heritage Site
A World Heritage Site is a landmark or area with legal protection by an international convention administered by the United Nations Educational, Scientific and Cultural Organization (UNESCO). World Heritage Sites are designated by UNESCO for ...
, the only Belgian component to the multinational inscription '
', because of their undisturbed nature and testimony to the ecological processes governing forests in Europe since the
Last Glacial Period.
History
The forest is part of the scattered remains of the ancient ''
Silva Carbonaria
Silva Carbonaria, the "charcoal forest", was the dense old-growth forest of beech and oak that formed a natural boundary during the Late Iron Age through Roman times into the Early Middle Ages across what is now western Wallonia. The Silva Carbo ...
'' or Charcoal Forest. The first mention of the Sonian Forest (''Soniaca Silva'') dates from the early Middle Ages. Then the forest south of
Brussels
Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
was crossed by the river
Zenne/Senne and extended as far as
Hainaut, covering most of the high ground between the Zenne and the
Dijle
The Dyle (french: Dyle ; nl, Dijle ) is a river in central Belgium, left tributary of the Rupel. It is long. It flows through the Belgian provinces of Walloon Brabant, Flemish Brabant and Antwerp. Its source is in Houtain-le-Val, near Nivelle ...
. The ninth-century ''
vita
Vita or VITA (plural vitae) is Latin for "life", and may refer to:
* ''Vita'', the usual start to the title of a biography in Latin, by which (in a known context) the work is often referred to; frequently of a saint, then called hagiography
* Vit ...
'' of
Saint Foillan
Saint Foillan (''Faélán, Faolán, Foélán, french: link=no, Feuillen'') is an Irish saint of the seventh century.
Family
Foillan was the brother of Saints Saint Ultan, Ultan and Saint Fursey, Fursey. He is described as the 'uterine brother ...
mentions "the forest, next to the abbey of Saint Gertrude, called the Sonesian". In the sixteenth century it was still seven
leagues in circumference. At the start of the 19th century the area of the wood was still about 100 square kilometres, but due to wood cutting its area diminished to its current area of 44.21 km².
The Forest extended in the Middle Ages over the southern part of
Brabant up to the walls of Brussels and is mentioned, under the name of
Ardennes
The Ardennes (french: Ardenne ; nl, Ardennen ; german: Ardennen; wa, Årdene ; lb, Ardennen ), also known as the Ardennes Forest or Forest of Ardennes, is a region of extensive forests, rough terrain, rolling hills and ridges primarily in Be ...
, in
Byron
George Gordon Byron, 6th Baron Byron (22 January 1788 – 19 April 1824), known simply as Lord Byron, was an English romantic poet and peer. He was one of the leading figures of the Romantic movement, and has been regarded as among the ...
's ''Childe Harold''. Originally it was part of the
Forest of Ardennes, the Romans' ''Arduenna Silva'', and even at the time of the
French Revolution
The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in November 1799. Many of its ideas are conside ...
it was very extensive. A major blow towards its nineteenth-century contraction was struck when
Napoleon Bonaparte
Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader wh ...
ordered 22,000 oaks to be cut down in it to build the
Boulogne flotilla intended for the invasion of England. King
William I of the Netherlands
William I (Willem Frederik, Prince of Orange-Nassau; 24 August 1772 – 12 December 1843) was a Prince of Orange, the King of the Netherlands and Grand Duke of Luxembourg.
He was the son of the last Stadtholder of the Dutch Republic, who w ...
continued to harvest the woods, and from in 1820 the forest was reduced to 11,200 in 1830. Rights to a considerable portion of the forest in the neighbourhood of Waterloo was assigned in 1815 to the
Duke of Wellington
Arthur Wellesley, 1st Duke of Wellington, (1 May 1769 – 14 September 1852) was an Anglo-Irish soldier and Tory statesman who was one of the leading military and political figures of 19th-century Britain, serving twice as prime minister o ...
, who is
Prince of Waterloo in the
Dutch nobility
The Dutch nobility is a small elite social class constisting of individuals or families recognized as noble, and with or without a title of nobility in the Kingdom of the Netherlands.
The existence of nobility was established in the Constituti ...
, and to the holder of the title as long as it endured; the present duke receives the equivalent of about $140,000 from his Belgian properties. This portion of the forest was only converted into farms in the time of the second duke. The
Bois de la Cambre
The () or (Dutch) is an urban public park in Brussels, Belgium. It lies in the south of the Brussels-Capital Region, in the municipality of the City of Brussels, and covers an area of , forming a natural offshoot of the Sonian Forest, which p ...
(456 acres) on the outskirts of Brussels was formed out of the forest in 1861. In 1911 the forest still stretched to
Tervuren
Tervuren () is a municipality in the province of Flemish Brabant, in Flanders, Belgium. The municipality comprises the villages of Duisburg, Tervuren, Vossem and Moorsel. On January 1, 2006, Tervuren had a total population of 20,636. The total ...
,
Groenendaal Groenendaal is a surname. Notable people with the surname include:
* Jacobus Groenendaal (1805–1860), South African politician
* Reinier Groenendaal (born 1951), Dutch cyclo-cross cyclist
*Richard Groenendaal
Richard Marinus Anthonius Groenend ...
, and
Argenteuil
Argenteuil () is a commune in the northwestern suburbs of Paris, France. It is located from the center of Paris. Argenteuil is a sub-prefecture of the Val-d'Oise department, the seat of the arrondissement of Argenteuil.
Argenteuil is the sec ...
close to
Mont-Saint-Jean and Waterloo.
Formerly the forest held the Abbey of
Saint Foillan
Saint Foillan (''Faélán, Faolán, Foélán, french: link=no, Feuillen'') is an Irish saint of the seventh century.
Family
Foillan was the brother of Saints Saint Ultan, Ultan and Saint Fursey, Fursey. He is described as the 'uterine brother ...
not far from
Nivelles
Nivelles (; nl, Nijvel, ; wa, Nivele; vls, Neyvel) is a city and municipality of Wallonia located in the Belgian province of Walloon Brabant. The Nivelles municipality includes the former municipalities of Baulers, Bornival, Thines, and Mons ...
. The forest served for a long period as an exclusive hunting ground for the nobility, but today is open to the general public.
Ecology
Today the forest consists mainly of
European beech
''Fagus sylvatica'', the European beech or common beech is a deciduous tree belonging to the beech family Fagaceae.
Description
''Fagus sylvatica'' is a large tree, capable of reaching heights of up to tall and trunk diameter, though more ...
es and
oaks. Several trees are more than 200 years old, dating from the Austrian period.
The forest contains a somewhat reduced fauna and flora. Due to human influence (encroachment from all sides of the outer edges as well as the long-established thoroughfare roads and highways cutting deep through the forest) and impoverishment of the ecosystem, various plants and animals have become extinct. The forest was home to 46 different mammal species. Of these, seven have disappeared altogether: the
brown bear
The brown bear (''Ursus arctos'') is a large bear species found across Eurasia and North America. In North America, the populations of brown bears are called grizzly bears, while the subspecies that inhabits the Kodiak Islands of Alaska is ...
(around 1000), the
wolf
The wolf (''Canis lupus''; : wolves), also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of ''Canis lupus'' have been recognized, and gray wolves, as popularly u ...
(around 1810), the
hazel dormouse
The hazel dormouse or common dormouse (''Muscardinus avellanarius'') is a small mammal and the only living species in the genus ''Muscardinus''.
Distribution and habitat
The hazel dormouse is native to northern Europe and Asia Minor. It is the ...
(around 1842), the
red deer
The red deer (''Cervus elaphus'') is one of the largest deer species. A male red deer is called a stag or hart, and a female is called a hind. The red deer inhabits most of Europe, the Caucasus Mountains region, Anatolia, Iran, and parts of wes ...
, the
badger
Badgers are short-legged omnivores in the family Mustelidae (which also includes the otters, wolverines, martens, minks, polecats, weasels, and ferrets). Badgers are a polyphyletic rather than a natural taxonomic grouping, being united ...
and the
hare
Hares and jackrabbits are mammals belonging to the genus ''Lepus''. They are herbivores, and live solitarily or in pairs. They nest in slight depressions called forms, and their young are able to fend for themselves shortly after birth. The g ...
.
Stag beetles
Stag beetles are a family of about 1,200 species of beetles in the family Lucanidae, currently classified in four subfamilies.Smith, A.B.T. (2006). A review of the family-group names for the superfamily Scarabaeoidea (Coleoptera) with corrections ...
have also disappeared from the forest.
The
boar
The wild boar (''Sus scrofa''), also known as the wild swine, common wild pig, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania. The species is ...
was thought to have been extinct since 1957, but in 2007, new specimens were discovered roaming the wood. According to the Flemish Agency for Nature and Forest (ANB), this is unlikely to be a natural spread, but probably two to four animals that most likely were either released or escaped from captivity.
The many species of
bat in the forest led to it being classified as a
Natura 2000
Natura 2000 is a network of nature protection areas in the territory of the European Union. It is made up of Special Areas of Conservation and Special Protection Areas designated under the Habitats Directive and the Birds Directive, respectiv ...
protected site. This includes five endangered species: the
mouse-eared bat
The mouse-eared bats or myotises are a diverse and widespread genus (''Myotis'') of bats within the family Vespertilionidae. The noun "''myotis''" itself is a New Latin construction, from the Greek "''muós'' (meaning "mouse") and "''oûs''" (me ...
,
Geoffroy's bat
Geoffroy's bat (''Myotis emarginatus'') is a species of vesper bat.
Description
''M. emarginatus'' is a medium-sized bat with long and woolly fur. The dorsal side of the torso is rust-brown to fox-red and the ventral side is a poorly delineat ...
, the
barbastelle bat, the
pond bat and
Bechstein's bat. Other animal species found in the forest, including the
black woodpecker
The black woodpecker (''Dryocopus martius'') is a large woodpecker that lives in mature forests across the northern Palearctic realm, Palearctic. It is the sole representative of its genus in that region. Its range is expanding. The black woodpec ...
and the
great crested newt, are considered endangered and are protected by the
European Habitats Directive
The Habitats Directive (more formally known as Council Directive 92/43/EEC on the Conservation of natural habitats and of wild fauna and flora) is a directive adopted by the European Community in 1992 as a response to the Berne Convention. The ...
.
In 2016, the Sonian Forest joined the "European Rewilding Network", an initiative of the
Rewilding Europe organisation. The project aims to enable the growth in numbers of natural fauna such as
roe deer
The roe deer (''Capreolus capreolus''), also known as the roe, western roe deer, or European roe, is a species of deer. The male of the species is sometimes referred to as a roebuck. The roe is a small deer, reddish and grey-brown, and well-adapt ...
and wild boar. Various types of
wildlife crossing
Wildlife crossings are structures that allow animals to cross human-made barriers safely. Wildlife crossings may include underpass tunnels or wildlife tunnels, viaducts, and overpasses or green bridges (mainly for large or herd-type animals); ...
s have been or are due to be constructed to reconnect the areas of the forest that are currently divided by large roads. A wildlife crossing ('Ecoduct') has been built across the
Brussels Ring
The Brussels Ring ( Dutch: ''Grote ring rond Brussel'', French: ''Ring de Bruxelles'') numbered R0, is a ring road surrounding the city of Brussels as well as other smaller towns south of Brussels. It is about long, with 2 or 3 lanes in each dire ...
(R0); construction started in 2016 and it was opened in June 2018.
Attractions
A museum has been set up in the building of the old farm of the Groenendaal priory. The ''Bosmuseum Jan van Ruusbroec'' or ''Musée de la Forêt'' ('Forest Museum') presents displays about the flora, fauna, history of the forest, and forest management.
Monasteries and contemplative traditions

Amongst the contemplative monks and nuns who lived and prayed in the forest, the most notable was
John of Ruysbroeck
John van Ruysbroeck, original Flemish name Jan van Ruusbroec () (1293 or 1294 – 2 December 1381) was an Augustinian canon and one of the most important of the Flemish mystics. Some of his main literary works include ''The Kingdom of the D ...
who established a Monastery near Groenendaal at Vauvert. At this time the forest also held a house of
Cistercian
The Cistercians, () officially the Order of Cistercians ( la, (Sacer) Ordo Cisterciensis, abbreviated as OCist or SOCist), are a Catholic religious order of monks and nuns that branched off from the Benedictines and follow the Rule of Sain ...
nuns at Pennebeek (founded 1201 on land given by
Henry I, Duke of Brabant
Henry I ( nl, Hendrik, french: Henri; c. 1165 – 5 September 1235), named "The Courageous", was a member of the House of Reginar and first duke of Brabant from 1183/84 until his death.
Early life
Henry was possibly born in Leuven (Louvain ...
to Sister Gisle); a convent of
Benedictine
, image = Medalla San Benito.PNG
, caption = Design on the obverse side of the Saint Benedict Medal
, abbreviation = OSB
, formation =
, motto = (English: 'Pray and Work')
, found ...
nuns at Forest (founded in 1107 by Gilbert de Gand) and a cloister of
Dominican sisters at Val Duchesne (founded 1262 the Duchess Aleyde).
Influence on literature
*
Byron
George Gordon Byron, 6th Baron Byron (22 January 1788 – 19 April 1824), known simply as Lord Byron, was an English romantic poet and peer. He was one of the leading figures of the Romantic movement, and has been regarded as among the ...
''
Childe Harold's Pilgrimage
''Childe Harold's Pilgrimage'' is a long narrative poem in four parts written by Lord Byron. The poem was published between 1812 and 1818. Dedicated to " Ianthe", it describes the travels and reflections of a world-weary young man, who is dis ...
''
*
Victor Hugo
Victor-Marie Hugo (; 26 February 1802 – 22 May 1885) was a French Romantic writer and politician. During a literary career that spanned more than sixty years, he wrote in a variety of genres and forms. He is considered to be one of the great ...
''
Les Misérables
''Les Misérables'' ( , ) is a French historical novel by Victor Hugo, first published in 1862, that is considered one of the greatest novels of the 19th century.
In the English-speaking world, the novel is usually referred to by its original ...
''
*
Sir Walter Scott
Sir Walter Scott, 1st Baronet (15 August 1771 – 21 September 1832), was a Scottish novelist, poet, playwright and historian. Many of his works remain classics of European and Scottish literature, notably the novels '' Ivanhoe'', '' Rob Roy ...
''The Field of Waterloo''
Influence on art
*
Auguste Rodin made frequent trips to the forest while living in Brussels in the 1870s. He made several paintings of the forest during this time.
Battle of Waterloo

The Forest of Soignes lay behind the Anglo-allied Army of the
Duke of Wellington
Arthur Wellesley, 1st Duke of Wellington, (1 May 1769 – 14 September 1852) was an Anglo-Irish soldier and Tory statesman who was one of the leading military and political figures of 19th-century Britain, serving twice as prime minister o ...
at the
Battle of Waterloo
The Battle of Waterloo was fought on Sunday 18 June 1815, near Waterloo (at that time in the United Kingdom of the Netherlands, now in Belgium). A French army under the command of Napoleon was defeated by two of the armies of the Seventh C ...
. From the time of the Romans it had generally been seen as a tactical blunder to position troops for battle in front of woodland because it hampers their ability to retreat.
Napoleon Bonaparte
Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader wh ...
in ''Mémoires pour servir à l'histoire de France en 1815, avec le plan de la bataille de Mont-Saint-Jean'' repeatedly criticised the Duke of Wellington's choice of battle field because of the forest to his rear.
On page 124, Bonaparte wrote, "He had in his rear the denies of the forest of Soignes, so that, if beaten, retreat was impossible", and on page 158 — "The enemy must have seen with affright how many difficulties the field of battle he had chosen was about to throw in the way of his retreat", and again on page 207 — "The position of
Mont-Saint-Jean was ill-chosen. The first requisite of a field of battle, is, to have no
defile
Defile may refer to:
* To make dirty or impure
* Defile (geography), in geography, a narrow pass or gorge between mountains
* Defile (military), to march off in a line
* The Defile, a pass between Suess Glacier and Nussbaum Riegel in Victoria ...
s in its rear. The injudicious choice of his field of battle, rendered all retreat impossible." However, Napoleon's view was contradicted by
Jomini, who pointed out that Wellington had good roads behind his centre and each wing which would have made a retreat through the forest safer than across an open field: Napoleon's cavalry would have been hampered by the forest in their attempts to turn any retreat into a rout. Some have argued that there was no bottom to the forest and it would not have hampered an extraction given Wellington's superlative expertise in handling an army disengaging from the enemy, while others have suggested that Wellington if pressed intended to retreat eastwards towards Blücher's Prussian army so the interior of the wood was of little military significance.
See also
*
Bois de la Cambre/Ter Kamerenbos
*
Rood-Klooster (''Rouge-Cloître'')
*
Groenendael Priory
*
List of Waterloo Battlefield locations
The Waterloo Battlefield is located in the municipalities of Braine-l'Alleud and Lasne and Waterloo, about south of Brussels, and about from the town of Waterloo. The ordering of the places in the list is north to south and west to east.
Nor ...
*
Enfants Noyés Nature Reserve The Enfants Noyés Nature Reserve (French: ''Réserve naturelle des Enfants'' Noyés'','' commonly called the ''Étangs des Enfants Noyés''; Dutch: ''Vijvers van de Verdronken Kinderen'') is a nature reserve consisting of three large ponds located ...
, a nature reserve in the Sonian Forest
References
External links
*
Sonian Forest Platform(in Dutch and French)
{{Authority control
Forests of Belgium
Urban forests in Belgium
Geography of Brussels
Geography of Flemish Brabant
Geography of Walloon Brabant
Tourist attractions in Brussels
Tourist attractions in Flemish Brabant
Tourist attractions in Walloon Brabant
Waterloo Battlefield locations
Auderghem
Hoeilaart
La Hulpe
Overijse
Sint-Genesius-Rode
Tervuren
Uccle
Waterloo, Belgium
Watermael-Boitsfort
Woluwe-Saint-Pierre
Primeval Beech Forests in Europe