Springs and Settlers
public
c. 3000 BCE
Stone Age Camps at the Hot Springs
Flint tools and hearth traces around today's Elisenbrunnen put people here roughly five thousand years ago. They came for the reason everyone since has come: water surfacing at around 74°C, hot enough to scald a hand held under it. Most scholars read the finds as seasonal camps rather than a settled village. The springs had already decided where Aachen would stand.
church
c. 50 BCE
The Celts Name a God for the Water
Before Rome arrived, local Celts credited the springs to Grannus, a healing god also venerated in Gaul and Britain. The evidence is thin — votive deposits, later Roman dedications — but the name itself is the strongest witness. Aachen descends, through Aquae Granni, straight from that god's name. Nothing else from these people survived; the word did.
Roman Aquae Granni
castle
1st century CE
Rome Builds Aquae Granni
Roman engineers channelled the sulphur springs into two bath complexes and hung a spa town off the road between Cologne and Maastricht, deep inside the province of Germania Inferior. Soldiers came down from the Rhine limes to soak their joints; the water smelled then exactly as it smells now, of struck matches and warm stone. No legionary fortress, no forum worth the name — Aachen's first identity was purely medicinal. Excavated foundations still sit under the Büchel and the Hof.
Frankish Beginnings
gavel
765
First Written Mention: Aquis Villa
Frankish annals record Pepin the Short keeping Christmas and Easter at 'Aquis villa' — the earliest surviving name-check of the place. By then Rome's baths were rubble the Franks were reusing as a royal farmstead with very good plumbing. The court came for the water and stayed for the hunting in the Ardennes forest edge. Pepin's son would take that habit considerably further.
Carolingian Empire
person
c. 794
Charlemagne Picks a Capital
After decades of ruling from the saddle, Charlemagne settled on Aachen as his principal winter residence and began building a palace complex to match the ambition. Einhard, his biographer, gives the reason plainly: the king loved to swim, and the hot springs let him hold court in the pool with a hundred men in the water alongside him. The empire ran from Denmark to Rome, and its paperwork ran from this valley. He was not a native — he made it the centre by force of preference.
church
c. 805
The Palatine Chapel Is Consecrated
An octagon inside a sixteen-sided ambulatory, 31 metres to the crown of the dome — nothing north of the Alps had looked like this for four centuries. The marble columns and bronze grilles were shipped up from Rome and Ravenna with papal permission, which is to say the building quotes the empire it intended to replace. Tradition credits Pope Leo III with the consecration; the architect Odo of Metz signed nothing but is named in a later inscription. Stand under the dome at noon and the gold tesserae throw light down the walls like coins dropped in water.
church
814
Charlemagne Is Buried Where He Swam
He died on 28 January 814 after a fever turned to pleurisy, aged around 66, and was buried the same day inside his own chapel — unusual haste, recorded without explanation. The grave made Aachen a shrine as well as a seat of government, and every later German king would trade on that. Otto III had the tomb opened in the year 1000; accounts of finding the emperor seated and crowned are legend, not record. His bones now sit in the Karlsschrein a few metres from where he bathed.
Coronation City
swords
881
Vikings Stable Horses in the Chapel
Norse raiders working up the Meuse burned the palace and, according to Frankish chroniclers, used Charlemagne's chapel as a stable. Sixty-seven years after the emperor's death, his capital had no army worth the name and no walls that mattered. The chapel survived because stone does not burn easily. Everything wooden around it did.
castle
936
Otto I Is Crowned on the Stone Throne
Otto I chose Aachen deliberately, sitting on the plain marble throne in the cathedral's upper gallery — six slabs, reportedly cut from the steps of the Church of the Holy Sepulchre in Jerusalem, with no ornament at all. The gesture worked: over the next 595 years, thirty German kings climbed those same steps to be crowned here. The throne is unpolished and slightly crooked. That's the point — the power was borrowed from the man buried downstairs.
gavel
1166
Barbarossa Grants the City Its Freedom
Frederick I Barbarossa confirmed Aachen as a Free Imperial City, answerable to the emperor and nobody in between. He had already engineered Charlemagne's canonisation the previous year through an antipope — a saint in the family tree being useful in a quarrel with Rome. Aachen got its charter, its own courts, and roughly seven centuries of prickly independence. Not bad for a town of a few thousand people around a bathhouse.
castle
1215
Frederick II Nails Shut the Golden Shrine
Fresh from his own coronation, Frederick II took a hammer and drove the final nails into the Karlsschrein himself, sealing Charlemagne's bones inside a gilded reliquary shaped like a church, 204 centimetres long and covered in silver figures of his imperial successors. Court chroniclers made much of the emperor doing manual labour in public. The shrine took twenty years and the best goldsmiths in the Rhineland to finish. It still sits in the choir, opened only for the pilgrimage.
local_fire_department
1349
Plague, and What Followed It
The Black Death reached Aachen in 1349 and did what it did everywhere — killed a large share of a crowded town in a few months. What followed was worse in a different way: across the Rhineland, Jewish communities were blamed and destroyed, Aachen's among them. Records of the aftermath are fragmentary and the local details disputed. The pattern across neighbouring cities is not.
church
from c. 1350
The Seven-Year Pilgrimage Begins
Every seventh summer the cathedral displays four textile relics — including a cloth said to be the Virgin's cloak — from the gallery above the crowd, a practice formalised in the mid-14th century and still running. Medieval pilgrims arrived in the tens of thousands and bought small mirrors, believing a reflected glimpse of the relics carried the blessing home. The badge trade financed a good deal of the city's building. The next Heiligtumsfahrt falls in 2028.
church
1414
The Glass House Opens
The Gothic choir hall was consecrated on the 600th anniversary of Charlemagne's death, its builders showing off with roughly 1,000 square metres of stained glass held up by almost nothing. The windows run over 25 metres — taller than a seven-storey building — and the locals nicknamed the whole thing the Glashaus. Grafting it onto Charlemagne's squat octagon produced the odd double personality the cathedral still has. Round and dark at one end, vertical and blazing at the other.
gavel
1531
The Last King Crowned Here
Ferdinand I was the thirty-first and final ruler crowned in Aachen. Reformation politics, Habsburg convenience and Frankfurt's superior banking finished the tradition; from 1562 the ceremonies moved permanently down the Main. Aachen lost its one irreplaceable function in a single generation. The throne stayed, empty, which is more or less how the city has traded ever since.
Spa and Occupation
local_fire_department
1656
The Great Fire Takes the Old Town
A fire that broke out on the night of 2 May 1656 — a baker's premises, by the traditional account — ran through the timber-framed centre and destroyed some 4,600 houses, roughly four-fifths of the city. The cathedral and the Rathaus survived, scorched. What went up in flames was the medieval town; what replaced it was Baroque, which is why Aachen's streets look younger than its history. The rebuilding took decades and money the city no longer really had.
palette
1701
Johann Joseph Couven, the Man Who Rebuilt the Look
Born in Aachen in 1701 and dead there in 1763, Couven became the architect who gave the post-fire city its Baroque and Rococo face, working across the triangle of Aachen, Liège and Maastricht. His interiors — panelling, stucco, the fussy elegance of a merchant class with spa money — survive in the Couven Museum on Hühnermarkt. He designed for bankers and clothiers, not emperors. The shift tells you exactly what Aachen had become.
gavel
1748
Europe Signs Its Peace in the Coronation Hall
The Treaty of Aix-la-Chapelle ended the War of the Austrian Succession in October 1748, negotiated by exhausted diplomats in a town everyone had already come to for the cure. Aachen's second career — neutral ground with good water and better gambling — was now fully established. Delegates complained about the food and the prices. The city's name was on the document, which was the point.
swords
1794
French Troops End the Free City
Revolutionary armies took Aachen in 1794 and dissolved six centuries of imperial freedom without much ceremony. Under the annexation confirmed in 1801 it became capital of the Département de la Roer, a French prefecture with a French mayor. Napoleon and Joséphine came to take the waters in 1804, and he made a show of admiring Charlemagne — the comparison was doing useful work for him. The city's guilds, monasteries and old constitution did not come back.
Prussian Aachen
gavel
1815
Prussia Inherits the Spa
The Congress of Vienna handed the Rhineland to Prussia, and Catholic, French-speaking, thoroughly Rhenish Aachen found itself administered by Protestant Berlin. It was not a happy match and remained not a happy match for a century. Prussian money did build the Elisenbrunnen between 1822 and 1827, the neoclassical colonnade where you can still smell the sulphur water from the street. Drinking it now requires a doctor's note.
public
1818
The Congress of Aix-la-Chapelle
Tsar Alexander I, Metternich, Wellington and Castlereagh spent autumn 1818 in Aachen deciding when to end the occupation of France and how to police post-Napoleonic Europe. It was the first of the great-power congresses and, socially, the peak of Aachen's spa century — the gambling rooms took a fortune off the visiting nobility. Diplomacy by day, roulette by night. Within thirty years the casino was closed and the aristocrats had moved on to Baden-Baden.
factory
1841
The Railway Arrives from Belgium
The line linking Cologne to Antwerp reached Aachen in 1841 and turned a spa town into an industrial one within a generation. Needles, cloth, glass, machinery and the coal of the Aachener Revier moved out; the smart carriages of the cure-takers thinned. Aachen made needles in industrial quantity — a trade so identified with the city that the word stuck to it. The 19th century treated the springs as a municipal amenity rather than a business.
school
1870
The Polytechnic Opens Its Doors
Aachen's Polytechnicum admitted its first cohort in 1870 — 223 students, a modest technical school for a mining and textile region. It became RWTH Aachen, and today it holds around 47,000 students in a city of roughly 250,000, which is why a quarter of the people you pass are under thirty and speaking four languages. Peter Debye studied here from 1901 and took a Nobel Prize in chemistry in 1936. The school outlived every industry it was founded to serve.
palette
1882
Barthold Suermondt Gives Away His Pictures
The banker and industrialist Suermondt handed the city 104 paintings in 1882, an act that created the museum now bearing his name and earned him honorary citizenship the same year. He had already sold a larger portion of his collection to Berlin to cover debts — the Aachen gift was what remained, and it was still very good. Dutch and Flemish masters, medieval sculpture, a serious collection in a provincial town. He died five years later in the city.
castle
1886
Mies van der Rohe, Stonemason's Son
Ludwig Mies was born on Steinkaulstraße in 1886 and grew up in his father's stone-carving workshop, learning materials before he learned drawing. He attended the local trade school, worked on stucco decoration for Aachen builders, and left for Berlin in 1905 at nineteen without a degree of any kind. The reverence for a cut edge and a good slab of marble that shows up in Barcelona in 1929 started in that yard. He never designed a building in his home town.
War and Ruin
local_fire_department
1938
The Synagogue Burns
On the night of 9-10 November 1938 the Aachen synagogue on Promenadenstraße was set alight and gutted, Jewish shops were smashed, and men were dragged off to camps. The community had been part of the city's commercial life for generations; within a few years it was effectively gone. A new synagogue stands on the same site, opened in 1995. The memorial names the people, which is the only useful kind.
swords
1944
The First German City to Fall
American forces surrounded Aachen in September 1944 and spent five weeks fighting street by street through the ruins; the garrison surrendered on 21 October. The battle cost the US First Army around 5,000 casualties and left roughly 80 percent of the historic centre wrecked, though the cathedral — sandbagged, its glass removed — came through with damage that could be repaired. Of some 165,000 residents, a few thousand were still in the cellars at the end. Aachen was the first major German city taken by the Western Allies, a fact the propaganda on both sides worked hard.
person
1945
Franz Oppenhoff, Mayor for Five Months
The Americans appointed Oppenhoff, a lawyer who had refused Nazi party membership, to run occupied Aachen in October 1944. On the night of 25 March 1945 an SS Werwolf commando parachuted in and shot him at his own front door in Aachen-Eilendorf. He was 42, and he had spent his brief term arguing with the occupiers about food rations for a starving city. The killers were Germans; that detail is the whole story of that spring.
European Aachen
public
1950
The Charlemagne Prize Invents a Tradition
A group of Aachen citizens founded the Karlspreis in 1949 and awarded it first in 1950, honouring work toward European unity in the Coronation Hall of the Rathaus. The list since reads as a register of postwar Europe: Churchill, Monnet, Havel, Merkel in 2008, Macron in 2018. A city on the Belgian and Dutch borders, bombed flat by a European war, decided its export would be integration. The ceremony still happens under Rethel's 19th-century frescoes of Charlemagne, which is either heavy-handed or exactly right.
church
1978
Germany's First World Heritage Site
UNESCO inscribed Aachen Cathedral in 1978, in the very first round of listings, making it Germany's earliest World Heritage Site and one of the twelve original entries worldwide. The citation names the octagon as the model that shaped church building across the north for two centuries. The treasury alongside it holds around 130 objects, including the Cross of Lothar with a Roman cameo of Augustus set into the gold. Roughly 1.25 million people came through in 2025 to look at a room 31 metres high and 1,200 years old.
science
2001
The Romans' Idea, Reopened
The Carolus Thermen opened in 2001 on the edge of the Stadtgarten, pumping the same mineral water the legionaries used into pools at around 38°C. Five thousand years after the first camps at the springs, the reason to come is unchanged — everything else about the city has been rebuilt at least twice. Coal is finished, the needle works are gone, and 47,000 students now sit where the empire's paperwork was drafted. The water kept its schedule throughout.