Lower German Limes

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The Lower Germanic Limes (Latin: limes ad Germaniam inferiorem, Dutch: Neder-Germaanse Limes, German: Niedergermanischer Limes) is the former frontier between the Roman province of Germania Inferior and Germania Magna. The Lower Germanic Limes separated that part of the Rhineland west of the Rhine as well as the southern part of the Netherlands, which was part of the Roman Empire, from the less tightly controlled regions east of the Rhine. Note: limes is a Latin word of two syllables. The route of the limes started near the estuary of the Oude Rijn on the North Sea. It then followed the course of the Rhine and ended at the Vinxtbach in present-day Niederbreisig, a quarter in the town of Bad Breisig, the border with the province of Germania Superior. The Upper Germanic-Rhaetian Limes then started on the opposite, right-hand, side of the Rhine with the Roman camp of Rheinbrohl. The Lower Germanic Limes was not a fortified limes with ramparts, ditches, palisades or walls and watchtowers, but a river border (Lat.: ripa), similarly to the limites on the Danube and Euphrates. The Rhine Line was guarded by a chain of castra for auxiliary troops. It was laid out partly by Augustus and his stepson...

As it runs along the Rhine the Lower Germanic Limes passes four landscapes with different topography and natural character. The southernmost and smallest portion, between the Vinxtbach and the area around Bonn still belongs to the Rhenish Massif, through which the river passes in a relatively narrow valley between the heights of the Westerwald and the Eifel Mountains. From roughly the area of Bonn, the Rhine valley opens into the Cologne Bay, which is bounded by the Bergisches Land, which hugs the river on the right-hand side, and the Eifel and High Fens to the southeast and east. The Cologne Bay has fertile loess soils and is characterized by a very mild climate. It is therefore little wonder that most of the rural vici and villae rusticae (farm estates) in Lower Germania were established in this area in Roman times. In the vicinity of the military camp of Novaesium, the Cologne Bay expands further into the Lower Rhine Plain, a river terrace landscape. Only a little west of today's German-Dutch border, roughly in the area of the legion camp of Noviomagus, the Lower Rhine Plain transitions into the watery marshland formed by the Rhine and Meuse and which finally ends at the North Sea in the Rhine-Meuse-Scheldt delta.

In 2021, UNESCO accorded WHS status to the Lower Germanic Limes, identifying 44 properties (some being clusters of several sites) strung out along the 400km lower Rhine valley. The list identifies, and aims to preserve, a representative selection of places that had Roman military activities along this section of the frontier. They have integrity and authenticity in their archaeological remains and show how the Roman Empire introduced complex new technology and ways of living to the area. A distinctive features of the Lower Germanic Limes was the presence of the Rhine. This was at once both an identifiable defensible boundary, but also a highly porous one, which allowed the movement of peoples, trade and ideas. The river itself was a crucial means of transport through the region, and became a major supply route to the North Sea and Britain, controlled by the Roman Navy on the Rhine, the Classis Germanica.

As a transnational nomination, the sites are located in Netherlands and Germany. Care of the individual properties falls respectively on the Netherlands government and the German federal state of North Rhine-Westphalia (plus one site in Rhineland-Palatinate ). This includes forts and marching camps dating back to the earliest arrivals of the Roman army in the area (around 16 BC) as well as development and rebuilding as more permanent fortifications were required at what became a fixed frontier rather than a staging post for the next conquest. Over the following four centuries the army brought with it industrial and engineering activities (Limekilns, pottery making, roads, canals, a naval base and a water supply aqueduct, for example). Civilian settlements, administrative, commercial, religious and entertainment sites also grew up alongside the more overtly military constructions.

The listed properties are each tightly defined around the specific features they are designed to protect. 106 individual sites are thus identified, although many of these are grouped as clusters of related features (multiple training camps, sections of canal, etc), giving a list of 44 places. Around each of the sites, and often joining the clusters into a coherent unit, the list identifies 'buffer zones'. These reach out beyond the specific protected site itself, and may protect views, settings or an overall context for a site or cluster, or could indicate unproven but possible areas where significant remains are yet to be discovered.

The following 19 sites/clusters fall within the modern jurisdiction of Netherlands. They are principally located on the Rhine-Meuse-Scheldt delta, characterised by flat alluvial plains. Waterlogged conditions have resulted in extremely good preservation of buried timber structures as well as ephemeral items buried in rubbish dumps.

All but one of the German locations falls within the state of North Rhine-Westphalia (The Auxiliary fort at Remagen is in Rhineland Palatinate ). Almost all of the sites are on the left (western) bank of the Rhine. Many of the military structures follow a similar chronology comprising a temporary camp with an earthen defensive boundary, replaced in the mid first century by timber defenses and later still by stone defences – particularly after the Revolt of the Batavi of AD 68–69. By the third century many military features were being abandoned, although some remained in use for a further 200 years. The civil settlements also persisted in use, and many have a direct successor in their modern settlements. In the 450s AD a Frankish invasion took control of Cologne, signaling the end of Roman control of the Lower Rhine. A number of sites can be matched with Roman place names, particularly from writers such as Tacitus and from ancient documents such as the map known as the Tabula Peutingeriana. The list below shows the 25 German sites (some individual places, some clusters of several component parts) that are now inscribed as part of the World Heritage Site.

The following 19 sites/clusters fall within the modern jurisdiction of Netherlands. They are principally located on the Rhine-Meuse-Scheldt delta, characterised by flat alluvial plains. Waterlogged conditions have resulted in extremely good preservation of buried timber structures as well as ephemeral items buried in rubbish dumps.

All but one of the German locations falls within the state of North Rhine-Westphalia (The Auxiliary fort at Remagen is in Rhineland Palatinate ). Almost all of the sites are on the left (western) bank of the Rhine. Many of the military structures follow a similar chronology comprising a temporary camp with an earthen defensive boundary, replaced in the mid first century by timber defenses and later still by stone defences – particularly after the Revolt of the Batavi of AD 68–69. By the third century many military features were being abandoned, although some remained in use for a further 200 years. The civil settlements also persisted in use, and many have a direct successor in their modern settlements. In the 450s AD a Frankish invasion took control of Cologne, signaling the end of Roman control of the Lower Rhine. A number of sites can be matched with Roman place names, particularly from writers such as Tacitus and from ancient documents such as the map known as the Tabula Peutingeriana. The list below shows the 25 German sites (some individual places, some clusters of several component parts) that are now inscribed as part of the World Heritage Site.

- Marinus Polak; Steve Bödecker; Lisa Berger; Marenne Zandstra; Tamar Leene (2021). Frontiers of the Roman Empire – The Lower German Limes: Nomination Text. UNESCO World Heritage Convention (Report).

- Tilmann Bechert: Germania inferior. Eine Provinz an der Nordgrenze des Römischen Reichs. Zabern, Mainz, 2007,

- Tilmann Bechert, Willem J. H. Willems: Die römische Reichsgrenze von der Mosel bis zur Nordseeküste. Stuttgart, 1995,

- Tilmann Bechert: Römisches Germanien zwischen Rhein und Maas. Die Provinz Germania inferior. (Edition Antike Welt, 4). Hirmer, Munich, 1982,

- Julianus Egidius Bogaers, Christoph B. Rüger (eds.): Der niedergermanische Limes. Materialien zu seiner Geschichte. Rheinland Verlag, Cologne, 1974,

- Michael Gechter: Die Anfänge des Niedergermanischen Limes. In: Bonner Jahrbücher. 179, 1979, pp. 1–129.

- Michael Gechter: Early Roman military installations and Ubian settlements in the Lower Rhine. In: T. Blagg, M. Millett (eds.): The early Roman empire in the West. 2. Auflage. Oxford Books 2002,

- Michael Gechter: Die Militärgeschichte am Niederrhein von Caesar bis Tiberius. Eine Skizze. In: T. Grünewald, S. Seibel (eds.): Kontinuität und Diskontinuität. Die Germania inferior am Beginn und am Ende der römischen Herrschaft, Beiträge des deutsch-niederländischen Kolloquiums in der Katholieke Universiteit Nijmegen, 27. bis 30 June 2001. De Gruyter, Berlin, 2003, pp. 147–159 ( Reallexikon der germanischen Altertumskunde, Ergänzungsband 35).

- Heinz Günter Horn (ed.): Die Römer in Nordrhein-Westfalen. Theiss, Stuttgart 1987; Lizenzausgabe. Nikol, Hamburg, 2002,

- Anne Johnson: Römische Kastelle des 1. und 2. Jahrhunderts n. Chr. in Britannien und in den germanischen Provinzen des Römerreiches. Zabern, Mainz, 1987,

- Margot Klee: Grenzen des Imperiums. Leben am römischen Limes. Konrad Theiss Verlag, Stuttgart, 2006.