Silva Carbonaria, the "charcoal forest",[1] 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 Carbonaria was a vast forest that stretched from the rivers
Zenne and the
Dijle in the north to the
Sambre in the south.[2] Its northern outliers reached the then marshy site of modern
Brussels.[3]
Further to the southeast, the higher elevation and deep river valleys were covered by the even less penetrable ancient Arduenna Silva, the deeply folded
Ardennes, which are still partly forested to this day. To the east, the forest was possibly considered to extend to the
Rhine. It was there in
Cologne in 388 CE that the magistri militum praesentalis Nannienus and Quintinus[4] began a counter-attack against a Frankish incursion from across the Rhine, which was fought in the Silva Carbonaria.[5]
Roman road
A great
Roman road forming a "strategic axis"[7] linked the Rhine crossing at
Cologne with
Maastricht, where it crossed the
Maas at the head of navigation. Skirting the northern edges of the Silva Carbonaria, it passed through
Tongeren,
Kortrijk and
Cambrai to reach the sea at
Boulogne. The highway was the main east–west route in a landscape where the river valleys, tributaries of the
Meuse and the
Scheldt, tended southwest to northeast. It remained viable through the
Early Middle Ages as the chaussée Brunehaut, the "Road of Brunehaut". As a public work its scale had become unimaginable in the Middle Ages: the chronicler
Jean d'Outremeuse solemnly related in 1398 that
Brunehaut, wife of
Sigebert I, had built this wide paved road in 526, and that it was completed in a single night with the devil's aid.[8]
Use as a border
There are signs that the Silva Carbonaria represented the boundary between the Roman provinces of
Gallia Belgica and
Germania Inferior. In the Middle Ages, these provinces were still represented by the church dioceses of
Reims and
Cologne. On a smaller level, the forest served as a boundary between the Roman civitates of the
Tungri to the east and the
Nervii to the west. This boundary continued to be used into the Middle ages as the boundary between the bishoprics of
Liège and
Cambrai.[6]
With the collapse of central Roman administration in the fourth century, Germanic
Franks living along the Rhine border established kingdoms within the empire, and settled in less populated areas. The
Salian Franks expanded their settlements from a starting point near
Nijmegen until they pressed into the more populated and Romanized areas in the Silva Carbonaria and near the Maas. The Romanized population came to be known as *walhōz or "strangers" to the Germanic Franks—continued speaking a
Late Latin, whose name survives in Walloon. In the past the Romance-Germanic linguistic division that marks Belgium to this day has been perhaps too facilely linked[9] to these geographic parameters.[10]
For a time in the sixth century, the Silva Carbonaria formed a barrier between the West Frankish kingdom of
Clovis and the East Frankish kingdom of
Sigebert the Lame, centred on Cologne, until he was assassinated in the forest of Buchaw by his son some time after 507, and Clovis joined the two kingdoms. [11] The Liber Historiae Francorum mentions that the Neustrian army invaded Austrasia in the succession battle of Pepin of Herstal and the war started when Ragenfrid and his army traversed the Silva Carbonaria.[12] The Annales Mettenses Priores inform us that the wealth of Pepin of Herstal's family was their vast territories between the Silva Carbonaria and the river Meuse.[13]
Throughout the rule of the
Merovingian dynasty, founded by Clovis, the Silva Carbonaria thus became the boundary between their two kingdoms of
Austrasia and
Neustria.[6] The Silva Carbonaria is mentioned in the
Salic Law of the Franks,[14] where it marked "the boundary of the territories occupied by the Frankish people".[15] The Liber Historiae Francorum mentions that the war of succession after the death of Pepin of Herstal started when the Neustrian army, under the command of Ragenfrid (mayor of the palace), traversed the Silva Carbonaria[16]
Medieval monasteries
Extensive tracts of the untamed woodlands belonged to monasteries. The Benedictine
Abbey of Lobbes lay in the Silva Carbonaria and that of
Saint Foillan, in the present-day
Sonian Forest (Forêt de Soignes/Zoniënwoud) not far from
Nivelles.[17] From the 8th century onwards, parts of the Silva Carbonaria were cleared for agriculture, eventually subdividing it in several smaller isolated forests like the Sonian forest today.[18]
Economic importance
The
charcoal—which gave the forest its name and into which the once seeming inexhaustible woods were slowly converted—was required to fuel the scattered smelting furnaces that forged the plentiful iron found in outcroppings laid bare by riverside erosion. Even before the Romans arrived, iron weapons forged in the Silva Carbonaria were traded by the Belgae to their cousins in the southeast of
Britain. In the High Middle Ages further woodlands were cleared. Today the most significant remnant[19] of the Silva Carbonaria is the
Sonian Forest,[20] preserved because it had been set aside as a noble hunt. At the start of the nineteenth century the area of this remnant of the primeval forest still covered about 100 square kilometres, but due to timber cutting its area has diminished to its current protected area of 44.21 km².
Notes
^Or Carbonarius saltus, "the charcoal ravine or wildwood" — in the sense of "unfit for the plough" (Hoffmann 1698, s.v. "Carbonarius saltus"); the lexicographer Hoffmann found Carbonaria silva mentioned by
Gregory of Tours, the twelfth-century chronicler
Sigebert of Gembloux, and
Johannes Trithemius.
^F. L. Ganshof, "Manorial Organization in the Low Countries in the Seventh, Eighth and Ninth Centuries" Transactions of the Royal Historical Society, 4th Series 31 (1949:29-59) p. 30.
^André De Vries, Brussels: A Cultural and Literary History, 2003:18.
^A. H. M. Jones, John Robert Martindale, J. Morris, eds. The Prosopography of the Later Roman Empire, 1971 s.v. Quintinus"
^According to
Sulpicius Alexander, quoted in Gregory of Tours, History of the Franks ii.9: multos Francorum, qui Rhenum transierant, a Romanis apud Carbonariam ferrô peremptos tradit, quoted by Hoffmann 1698.
^
abcUlrich Nonn, Pagus und Comitatus, pp.226-234 and map.
^Émile Cammaerts, A History of Belgium from the Roman Invasion to the Present Day, 1921: 34, in general following conclusions based on
toponymy by the historian
Godefroid Kurth.
^The historiography of this idea is traced by Luc van Durme in "Genesis and evolution of the Romance-Germanic language border in Europe", in Jeanine Treffers-Daller and Roland Willemyns, eds. Language Contact at the Romance-Germanic Language Border, 2002:39ff.
^"At that stage, the silva Carbonaria separated Clovis's Salian kingdom from Sigebert's eastern domain." (The Cambridge Ancient History, eo.loc.); "The Silva Carbonaria formed for a time a natural barrier between Salians and
Ripuarians, though it may not have proved very effective," (
John Michael Wallace-Hadrill, The Barbarian West, 400-1000 1996:70); in the chronicle of the Monastery of Saint Arnulf, under the year 690: adunatô exercitu Peppinus ad Carbonariam silvam pervenit: qui terminus utraque Regna dividit.
^Liber Historiae Francorum (51) "“Theudoaldo, enim fugato, Ragamfredo in principatum maiorum palacii elegerunt. Qui, commoto cum rege exercitu Carbonaria silva transeuntes, usque Mosam fluvium terras illas vastantes succenderunt; cum Radbode duce gentile amiciciam feriunt.”" ("However, Theudoald fled and a terrible persecution happened in that time. After Theudoald left, Ragenfrid was elected as the ‘princeps’ maior of the palace. After having assembled an army with the king, he traversed the Silva Carbonaria and devastated all lands up to the Meuse and burned places. Then they concluded a pact of friendship with the pagan, dux Radbod.”) The Neustrian army and their new Frisian allies advanced and took the city of Cologne. Shortly afterwards, when the Neustrian army laden with booty retreated from Cologne to Neustria, Charles Martel waited in ambush and defeated them at the Amblève river.
^Annales Mettenses Priores, “Ad solacium autem prestante Domino tantae rei publicae administrationis erat ei gloriosa genitrix, cunctis laudibus digna, nomine Begga, filia Pippini precellentissimi quondam principis, qui populum inter Carbonariam silvam et Mosam fluvium et usque ad Fresionum fines vastis limitibus habitantem iustis legibus gubernabat.” (“As support, however, in the administration of such large state, the Lord providing, he (Pepin of Herstal) had his glorious mother, Begga by name, worthy of all praise. She was the daughter of the late most excellent Pippin (of Landen), who with just laws governed the population living in the vast territories between the Forest Carbonaria and the river Meuse up to the borders of the Frisians.”)
^Title 47 of Lex Salica specifies that the interested parties in a contested ownership meet within forty days if they live within the bounds of the Silva Carbonaria and the
Loire; otherwise eighty days must be allowed. (T.M. Charles-Edwards, in Iorwerth Eiddon and Stephen Edwards, eds. The Cambridge Ancient History, vol. XV [Cambridge University Press] 2005:273.
^ As
Gregory of Tours noted, Rhenum transierunt, pluribus suorum in Romano relictis solo, ad repetendam depopulationem paratis, cum quibus congressua Romanis adcomodus fuit, multis Francorum apud Carbonariam ferro perimptis. (Historia Francorum ii.9.).
^Liber Historiae Francorum (51) “Theudoaldo, enim fugato, Ragamfredo in principatum maiorum palacii elegerunt. Qui, commoto cum rege exercitu Carbonaria silva transeuntes, usque Mosam fluvium terras illas vastantes succenderunt; cum Radbode duce gentile amiciciam feriunt.” (However, Theudoald fled and a terrible persecution happened in that time. After Theudoald left, Ragenfrid was elected as the ‘princeps’ maior of the palace. After having assembled an army with the king, he traversed the Silva Carbonaria and devastated all lands up to the Meuse and burned places. Then they concluded a pact of friendship with the pagan, dux Radbod.”). The Neustrian army advanced to Cologne and took the city. When they retreated from Cologne to Neustria, Charles Martel waited in ambush and defeated them at the Amblève river.
^Hoffmann 1698, Laubiense Monasterium in Silva Carbonaria esse situm, auctore Fulcuinô; esse et Coenobium S. Foillani in silva Soniaca parte Carbonariae non longe a Niviala:
^Koen Deforce, Bart Vanmontfort and Kris Vandekerkhove, Early and High Medieval (c. 650 AD - 1250 AS) Charcoal Production and Its Impact on Woodland Composition in the Northwest-European Lowland, in: Environmental Archaeology, 2018, p. 169
^There are seven other forests in Belgium that are also remains of the Silva Carbonaria
^De Vries 2003:13; Hofmann, in the late seventeenth century, noted this remnant in writings of Gotefridus Wendelinus and also remarked on remnants in the Forêt de Mormaux or Mormal, the Bois de Cirau, and the woodland called Die Leu that stretched from
Leuven to the gates of
Diest, the forest-covered Hageland or Hagelanden.
Mentioned as a boundary in the Lex Salica. Various versions can be compared
here and
here on the dMGH.de (
Monumenta Germaniae Historica) collection.
The
Liber Historiae Francorum repeats the story found in Gregory of Chlodio going through the forest to take Tournai. Latin is
here on the dMGH.de collection.