Heerlen (Limburgs: local Heële) is a city and municipality in the
southeast of the Dutch province of Limburg. On August 1, 2020,
Heerlen had 86,915 inhabitants (CBS). Heerlen is thus the largest
municipality in the Eastern Mining Region, and the fourth in
Limburg, after Maastricht, Venlo and Sittard-Geleen.
Heerlen's history goes back a long way. The Romans founded a
settlement called Coriovallum and built a thermal complex there that
is now considered the best preserved antique building in the
Netherlands. The place remained inhabited in the Middle Ages as
'Herle'. Impressive growth did not follow until the beginning of the
twentieth century, through the extraction of coal. Mining provided
prosperity and population growth. After the mines disappeared,
Heerlen struggled for a long time with unemployment and economic
hardship. This was partly absorbed by the establishment of a number
of large companies and government agencies.
From an
administrative point of view, Heerlen is today formed by four
districts - Heerlen-Stad, Heerlerheide, Heerlerbaan and Hoensbroek -
which are divided into separate districts. Heerlen is part of the
administrative partnership Parkstad Limburg, where a total of around
240,000 people live. Since 2006, this small city region in size has
had the special status of plus region. This status was abolished in
2014.
Heerlen’s cultural scene is surprisingly rich. Highlights include:
Glaspaleis (Glass Palace) and Schunck complex — A 1935 modernist icon by
architect Frits Peutz, listed among the world’s 1,000 most important
20th-century buildings. Now a cultural center with a library, modern art
museum, theater, and exhibitions.
Thermenmuseum (Romeins Museum
Heerlen) — In-situ Roman baths with mosaics, walls, and artifacts;
includes the oldest known Dutch “love letter” on a Roman tile.
Dutch
Mining Museum (Mijnmuseum) — Housed in a former mine shaft, with tools,
exhibits on mining life, and guided tours.
Historic churches (e.g.,
Sint-Pancratiuskerk), watermills (Oliemolen, Weltermolen), and nearby
castles like Hoensbroek Castle (one of the largest in the Netherlands)
and Kasteel Terworm.
Nature and outdoors: Brunssummerheide, Aambos
city park (with a small free zoo), hiking/biking trails, and the hilly
Limburg landscape.
Events: Cultura Nova festival, GP Heerlen
cyclo-cross, street art tours, and markets.
Although there are traces of earlier settlement, the
settlement history of Heerlen only began with the arrival of the
Romans. They founded a military settlement there 2000 years ago,
which they named Coriovallum. The Romans built, among other things,
a bathhouse and practiced pottery.
The oldest written mention
of Heerlen or 'Herle' is in a deed of 1065. Heerlen gradually
developed during the Middle Ages as an agricultural village, with
mills and farmsteads.
Heerlen was a fairly isolated village
until well into the 19th century. The main livelihood was
agriculture, there were no good supply and disposal roads. If you
wanted to travel by train, you first had to walk to Simpelveld (on
the railway line Aachen - Maastricht) or Sittard (the railway line
Maastricht - Venlo) to take the train there. It was also possible to
go to Valkenburg, Sittard or Aachen by postal wagon. It was not
until 1896 that the Sittard - Herzogenrath railway line was
established, built by the railway builder Henri Sarolea, who would
later manage the Oranje-Nassau mines with the brothers Carl and
Friedrich Honigmann.
That railway was urgently needed in
connection with the exploitation of coal. In 1894 the construction
of the Oranje-Nassau mine I, 1899–1974 had already started, which
went into production five years later. Three more mines were built
on Heerlen's territory: the Oranje-Nassau III (1917–1973) in
Heerlerheide, Oranje-Nassau IV (1927–1966) in Heksenberg and the
State Mine Emma (1911–1973) in Treebeek (at that time territory of
the municipality of Heerlen) .
The population grew
explosively in a short time: from a village with 6646 inhabitants in
1900 to a city of 32,263 inhabitants in 1930. For all these people
from home and abroad, houses, schools, shops and a hospital had to
be built, roads had to be built. and so on, all in a very short
time. It is therefore not surprising that very few historical
buildings have been preserved. In the great change from village to
city they no longer fit in a modern cityscape and so they were
demolished. The high chimneys at a coal mine were characteristic for
Heerlen during the mining period. These chimneys were popularly
referred to as Lange Jan (1938-1976, 138m) and Lange Lies
(1953-1976, 155m), and were visible from a very great distance.
Little reminds us of that coal past of the city. The slag heaps
have been excavated and turned into residential areas or parks, the
cooling towers and large chimneys have disappeared. The shaft
building of the Oranje-Nassau I is the most striking and immediate
remnant. The many neighborhoods that were built in the years before
the Second World War are still striking witnesses of that striking
period in Heerlen's history. The only remaining rock mountain in its
original state (also in the whole of the Netherlands), of the
Oranje-Nassau IV, is located on the edge of the Brunssummerheide,
but is threatened with excavation because it contains precious
silver sand.
Remarkable buildings have been preserved here
and there in Heerlen, reminding us of the time when Heerlen and the
Eastern Mining Region were a growth area. In 1935 a very famous
building was completed, the Glaspaleis of client and local
shopkeeper Peter Schunck.
After years of decay and
restoration, the Glass Palace was put back into use in 2004, now as
a cultural center. The building is located in the center of the
city, surrounded by the three central squares: Bongerd (Markt),
Pancratiusplein and Emmaplein. It is a national monument and one of
the 1,000 most important 20th-century buildings in the world
according to a Union of International Architects classification. In
addition, the building and its restoration have received many
awards. One of the aspects in which it was far ahead of its time is
energy consumption. Soon after commissioning, it turned out that the
installed heating was not necessary even in winter, because it works
like a greenhouse.
Heerlen is a city and municipality in the southeastern Netherlands,
located in the province of Limburg within the South Limburg
(Zuid-Limburg) region. It sits at approximately 50°53′N 5°59′E (or
50.883°N, 5.983°E), roughly 20–25 km east of Maastricht, immediately
north of the German city of Aachen, and close to the Belgian border.
This places Heerlen in the heart of the Euroregion Meuse-Rhine, a
cross-border area where the Netherlands, Germany, and Belgium converge.
As part of the Parkstad Limburg agglomeration (formerly the Oostelijke
Mijnstreek or Eastern Mining District), Heerlen forms one of the main
urban centers in a cluster of eight municipalities with a combined
population of around 250,000. The municipality itself covers 45.53 km²
(of which 44.94 km² is land and 0.59 km² water) and borders Simpelveld
to the south, Voerendaal and Nuth to the west, Schinnen to the
northwest, Brunssum to the north, Landgraaf and Kerkrade to the east,
and the German municipality of Aachen to the southeast.
Topography and Terrain
Heerlen stands out dramatically against the
predominantly flat Dutch landscape. It occupies a dissected plateau in
the Heuvelland (Hill Country) of South Limburg, one of the few truly
hilly regions in the Netherlands. Elevations here range from about 62 m
(203 ft) in the lower valleys to 217 m (712 ft) at higher ridges within
the municipal area, with an average elevation of around 131 m (430
ft)—making Heerlen one of the highest-lying cities in the country (often
cited with a central elevation of ~113 m / 371 ft).
The terrain
consists of rolling hills, gentle slopes, and incised valleys, shaped by
erosion of the underlying geology. South Limburg’s hills are foothills
of the broader Ardennes massif to the south, with a patchwork of
meadows, woodlands, loess-covered plateaus, and agricultural fields.
Unlike the polder-dominated west and north of the Netherlands (much of
which lies at or below sea level), South Limburg rises to over 300 m at
its highest point nationally (Vaalserberg, ~30 km southeast of Heerlen).
Within Heerlen, the landscape features subtle ridges and shallow basins,
historically dotted with farms and mills along stream valleys.
Post-1970s coal-mine closures, former spoil heaps (terril) have been
landscaped into green hills and parks, blending industrial heritage with
natural relief.
Hydrography: Streams and Valleys
Heerlen’s
hydrology centers on several small streams that carve green valleys
through the hills. Key watercourses include:
Caumerbeek —
originates southeast of the historic center and flows northwest.
Geleenbeek — rises near Benzenrade (part of Heerlen) and flows generally
northwest toward the Meuse River catchment.
Schandelerbeek — another
local stream.
These streams historically powered watermills
(e.g., Weltermolen, Schandelermolen) and supported early settlement and
agriculture. The Roman-era bathhouse in central Heerlen (Coriovallum)
was strategically built on a sloping plateau between the Caumerbeek
(water supply) and Geleenbeek (drainage). The valleys remain green
corridors today, with older farms, castles (such as Hoensbroek Castle),
and nature along their banks. The area drains ultimately toward the
Meuse (Maas) River system. Recent events, such as the 2021 floods,
highlighted the flash-flood risk in these steep, loess-covered
catchments during extreme rainfall.
Climate
Heerlen has a
temperate oceanic climate (Köppen Cfb), typical of the Netherlands but
slightly more continental due to its southern latitude and elevation.
Average annual temperatures hover around 10–10.5 °C. Summers are
comfortable (average highs ~20–22 °C in July/August) and partly cloudy,
with rare extremes above 30 °C. Winters are long, cold (average lows
near or below freezing in December–February), windy, and mostly cloudy,
with occasional snow. Annual precipitation is moderate at approximately
750–850 mm (often cited ~789 mm), distributed fairly evenly year-round
but with a slight autumn/winter peak. Higher rainfall than the national
average supports lush vegetation. Wind is more noticeable on the exposed
ridges than in the flat Dutch lowlands.
Geology and Soils
The
subsurface reflects a long geological history. The deeper layers contain
Carboniferous coal seams (the basis for 19th–20th century mining),
overlain by Cretaceous limestone and marl formations typical of South
Limburg. Surface soils are predominantly loess (wind-deposited silt)
from the last Ice Age, which is fertile but prone to erosion on slopes.
Fault lines and karstic features (e.g., marl caves elsewhere in the
region) add complexity. Mining caused subsidence in parts of the city,
influencing modern urban planning and land use.