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International Boundary Study 

 
 

No. 7 â€“ June 30, 1961 

Belgium â€“ Germany 

Boundary 

 

(Country Codes:  BE-GM) 

 

 
 

The Geographer 

Office of the Geographer 

Bureau of Intelligence and Research

 

 

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INTERNATIONAL BOUNDARY STUDY 

 

No. 7 

 

BELGIUM - GERMANY BOUNDARY 

 
 

TABLE OF CONTENTS 

 
 

 

 

Page 

 
 

I. 

Boundary Brief............................................................. 

 
 

II. 

Background.................................................................. 

 
 

III. 

Treaties .......................................................................... 

 
 

IV.  Summary ....................................................................... 

6

 

 
 
 
 

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BELGIUM - GERMANY BOUNDARY 

 

I.  BOUNDARY BRIEF 

 
According to official German sources, the Belgium-Germany boundary is 167 kilometers 
(104) in length, while Belgian sources cite 162 kilometers (101 miles).

1

 

 
 

II. BACKGROUND 

 
The Belgium  - Germany boundary, as delimited by the Congress of Vienna in 1815, was 
declared to be the "historical line" of division between the two states.

2

  Demarcated during 

the next year, over a century passed before revisions were made.  Under the provisions of 
Articles 31  - 35 of the 1919 Treaty of Versailles, the territories of Eupen-Malmedy and 
Moresnet were ceded to Belgium.  In total, 1036 square kilometers (approximately 400 
square miles) and 60,000 inhabitants were transferred.  Although dissatisfied with the 
general territorial clauses of Versailles, Germany did not exert political pressure on the new 
Belgian frontier until World War II.  In fact, peaceful negotiations in 1935 led to the transfer 
to Germany of two small parcels of land near Aachen to permit improvements in the layout 
of the freight yards. 
 
On May 23, 1940, the Congress of Vienna boundary again came into force with the 
publication of an edict reuniting Eupen-Malmedy and Moresnet with Germany.  The edict 
was invalidated with the end of hostilities and the territory reverted to Belgian sovereignty. 
 
In the early post-war period both the Netherlands and Belgium proposed to the occupying 
powers that certain provisional rectifications be made along their boundaries with 
Germany.  The "Working Party on Provisional Adjustments to the Western Frontiers of 
Germany" approved in 1949 the transfer of seven small parcels of land (20 square 
kilometers; 500 inhabitants) to Belgium:

3

 

 

1.  Bildchen 
2.  Lichtenbusch 
3.  Fringshaus 
4.  Leykoul 
5.  Elsenborn 

                                                                 

1

 Boundary lengths are usually determined by map measurement and many factors affect the accuracy of 

the results:  1) the precision of the measuring tool; 2) the experience of the operator, 3) the scale of the 
map, 4) the degree of  generalization followed by the mapping agency, etc.  As a result, a certain margin of 
difference should be anticipated with all measurements.  Since all maps are generalized, the larger figure is 
recommended as being more accurate. 
 

2

 In actuality the boundary was between the Low Countries and Germany; Belgium was not separated from 

the Netherlands until almost 25 years later. 
 

3

 All of the post-war changes have been with the territory of the Federal  Republic of Germany.

 

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6.  Losheim 
7.  Hemmeres 

 
After a brief period of negotiation, Belgium and Germany signed on September 24, 1956, 
a "Treaty ... concerning the Rectification of the … Boundary and Other Questions."  The 
main purpose of the treaty was to solve the technical questions of frontier communications, 
drainage, and customs control which had been the underlying causes of the 1949 
provisional rectifications.  The treaty solution was an admirable compromise eliminating 
irritating inequities with a minimal transfer of territory (see orientation map). 
 
The provisionally transferred areas of: 
 

1.  Bildchen 
2.  Lichtenbusch 
4.  Leykoul, and 
7.  Hemmeres 

 
were returned to Germany intact.  At Fringshaus (3), a complicated road junction, certain 
Belgian territory (I) was ceded to Germany while the road south to Konzen (A) was 
assigned permanently to Belgium as was the Elsenborn salient (B).  At Losheim, an 
adjustment returned Losheim village (6) and the highway to Hollerath to Germany while the 
section enclosed by the highway and the railroad (C) was ceded to Belgium. 
 
The adjustments became effective on September 10, 1958. 
 
 

III.  TREATIES 

 
In the following discussion, the 19th century treaties are included only for historical 
background.  Their provisions were totally negated by the provisions of the Treaty of 
Versailles and subsequent agreements. 
 

A.  General Treaty Between Great Britain, Austria, France, Portugal, Prussia, 
Russia, Spain, and Sweden

 signed at (Congress of) Vienna on June 9, 1815. 

 
The Congress of Vienna treated the boundary between Prussia and the Low Countries as 
the "historical" boundary.  The provisions were placed in effect by treaty (B) below and ran 
from 1816 to 1919 and from 1940 to 1945. 
 

B.  Boundary Treaty Between Prussia and the Netherlands 

signed at Aachen on 

June 26, 1816. 
 
This treaty incorporated the detailed delimitation and demarcation of the boundary 
established in more general terms by the Congress of Vienna. 
 

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C.  Treaty Between Great Britain, Austria, France, Prussia, and Russia, on the one 
part, and the Netherlands, on the other

, signed at London on April 19, 1839. 

 
The division of the Low Countries was finally effected and the 1815 boundary was 
separated into two sectors, i.e., Belgian and Netherlands. 
 

D.  Treaty of Versailles

 signed at Paris on June 28, 1919. 

 
The Articles 31 - 35 created an entirely new boundary by detaching Moresnet and Eupen-
Malmedy from Germany.  Delimitation of the boundary was totally lacking in the normal 
sense, but provisions for detailed delimitation and demarcation were provided under 
Article 35. 
 
 

E.  Report of the Belgian - German Boundary Demarcation Commission

 signed at 

Aachen on November 6, 1922. 
 
The Report is the definitive document for the precise delimitation and demarcation of the 
Versailles boundary.  The very detailed and technical report was published in the Moniteur 
Belge of March 7, 1925, as an annex to a law incorporating the ceded territory into the 
Belgian provincial structure. 
 

F.  Treaty Between the Kingdom of Belgium and the German Reich Relative to 
Effect an Exchange of Territory on the Belgian - German Frontier

 signed at Aachen 

on May 10, 1935. 
 
Two small parcels of land, approximately 1.7 square kilometers in extent, were ceded by 
Belgium to permit an orderly expansion of the Aachen freight yards.  The area involved was 
so small that the boundary representation, except for the largest-scale maps, was 
unaffected. 
 

G.  Report of the Western German Frontier Demarcation Commission - Southern 
Group - Belgian - German Frontier

 issued at Arlon (Belgium) on September 9, 1949. 

 
The Report represented the detailed delimitation and demarcation work supplementing the 
"Communique of a Working Party on Provisional Adjustments to the Western Frontiers of 
Germany" issued in Paris on March 29, 1949. 
 
Seven parcels of territory (20 square kilometers; 500 inhabitants) were provisionally placed 
under Belgian administration.  The final disposition of the territory was accomplished by the 
1956 Treaty cited below. 
 

H.  Treaty between the Federal Republic of Germany and the Kingdom of Belgium 
concerning Rectification of the German - Belgian Boundary and other Questions

 

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signed at Brussels on September 24, 1956. 
 
Minor but vexing problems of border administration, customs control, communications and 
stream pollution had, for a number of years, led to dissatisfaction with specific areas along 
the boundary.  While the provisional rectifications of 1949 alleviated most of the irritating 
problems, they unfortunately created others of similar magnitude.  The territorial provisions 
of the 1946 treaty represent a good compromise and should eliminate the causes of 
irritation: 
 

Article 1 

 

"(1)In order to establish a suitable boundary line between the two countries, 

eliminating irregularities and conforming to local conditions and the 
requirements of transportation, the High Contracting Parties have agreed upon 
the following boundary rectifications: 

 

(a) Belgium relinquishes the exercise of governmental jurisdiction over the 

following sections of territory: 

 

1.  The town of Aachen  - Bildchen, specifically that portion of its territory 

situated between boundary markers 1017 and 980 and between the 
provisional markers of 980/1 and 980/36; 

 
2.  The section of the Raeren highway and the forest of Freyen (south of 

Lichtenbusch) between boundary markers 943 and 920 and the 
provisional markers 919/1 and 919/55; 

 

3.  The highways from Rotgen to Fringshaus and from Fringshaus to 

Lammersdorf between boundary markers 812, 813 and 776, 775; 

 

4.  A portion of the hamlet of Leykoul, specifically the section of territory 

situated between boundary markers 652 and 648, and along the 
Breitenbach, from the provisional boundary marker 647/1 through 647/4 
to marker 652; 

 

5.  The section of Highway L 25 and the triangular wooded tract belonging to 

Bulling (Bullange) Forest between boundary markers 493, 477/476 as far 
as marker 451 and the provisional markers 404/63 through 404/75 as far 
as 404/115; 

 

6.  The locality of Losheim, specifically that portion of territory situated 

between boundary markers 451 and 405 and the provisional markers 
404/1 to 404/63; 

 

7.  The portion of the locality of Hemmeres between boundary markers 

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161/160 to marker 150 and the provisional markers 149/1 to 149/24. 

 

(b) The Federal Republic of Germany cedes to Belgium the following Belgian-

administered portions of territory: 

 

1.  The highway from Fringshaus to Konzen between boundary markers 813 

C and 775 D and markers 761 A and 762; 

 
2.  The wooded tract between boundary markers 624 and 572 and 

provisional markers 572/1 and 572/32 (Wahlerscheid Forest); 

 

3.  The triangular tract southwest of Highway L 25 at the locality of Losheimer 

Graben between boundary markers 476 to 451 and a line running 
alongside the southwest edge of Highway L 25 parallel to the provisional 
boundary markers 404/63 and 404/75. 

 

(c) Belgium cedes to the Federal Republic of Germany the portion of territory 

lying north of the highways from Rotgen to Fringhaus and from Fringshaus to 
Lammersdorf (between boundary markers 812 and 776) as far as the right-
of-way of the railway line from Raeren to Kalterherberg (between boundary 
markers 800 and 787). 

 

(2) These boundary rectifications are shown in detail on the maps attached to this 

Treaty as Annex 1 (a) to (h)." 

 
 

IV.  SUMMARY 

 
Half-tone reproductions of the original treaty maps are annexed to this study. 
 
Map 1b shows the Bildchen area which was returned to Germany.  The boundary, as a 
result, is identical with the pre-1949 boundary. 
 
Map 1c covers the Lichtenbusch area which was similarly returned to Germany 
sovereignty.  The highway on the border and the Am Todtleger parcel had been under 
provisional Belgian administration. 
 
Map 1d is of the very complicated road junction of Fringshaus.  Before 1949 the three 
roads had been in Germany while the territory on all sides was under Belgian 
administration.  In 1949 the roads were provisionally transferred to Belgium.  The 1958 
solution saw the cession of Belgian territory north of the roads and the return of the two east 
- west segments to Germany.  In turn Germany ceded the north - south stretch of highway to 
Belgium. 
 
On map 1e the return of the small Leykoul salient to Germany is represented.  Map 1f 

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illustrates the return of  the Udenbreth  - Losheimer Graben road and the Losheim area to 
Germany as well as the cession of the forest area west of the road to Belgium. 
 
The retrocession of the Hemmeres salient to Germany is shown on map 1g while the final 
map, 1h, represents the new boundary resulting from the transfer of the Monschau city 
forest to Belgium. 
 
The remaining segments of the boundary were unaffected by the 1958 rectifications and 
official Belgian and German maps show these portions accurately at all scales. 
 
Since Article 7 of the Bonn Convention on Relations provides that the final determination of 
the boundaries of Germany must await a peace settlement of the whole of Germany, these 
frontier arrangements are necessarily provisional. 
 
 

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This International Boundary Study is one of a series of specific boundary papers prepared 
in the Office of the Geographer, Department of State, in accordance with provisions of 
Bureau of the Budget Circular No. A-16, Exhibit D. 
 
Government agencies may obtain additional information and copies of the study by calling 
the Office of the Geographer, Room 7334, State Department Building, Department of 
State, Washington 25, D.C. (telephone:  Code 182, extension 4276).  Unfolded copies of 
map enclosures may be obtained from the Map Library, Code 182, extension 3322. 
 
 
 


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