Berlin and Cölln from the air, as Johann Bernhard Schultz drew them in 1688. The towns of this story lie inside the later fortifications.Image: Johann Bernhard Schultz, 1688. Wikimedia Commons. Public domain.
Berlin and Cölln
Under Cölln’s parish church, radiocarbon puts the two oldest burials no later than 1160. The twin towns on the Spree grew rich, joined forces twice, and in 1442 handed their keys to a Hohenzollern who built a castle beside them.
01The Petriplatz, Cölln
There is no founding charter for Berlin or for Cölln. Perhaps one was destroyed; perhaps none was ever written. The Chronicle of the Margraves of Brandenburg, written around 1280, says only that the margraves Johann I and Otto III built Berlin, among other towns.
So the answer had to come out of the ground. From 2007 archaeologists dug the Petriplatz, the heart of medieval Cölln. They found the foundations of five successive churches, the Latin school, wooden cellars and 3,223 graves holding 3,791 people. The oldest timber, from an oak well, was felled around 1203.
Cölln was planned: the streets came first, and the plots were measured off them.
Radiocarbon gives a span, not a year. The two oldest grave dates fall in a flat stretch of the calibration curve between 1040 and 1160: the people in them lived no later than 1160, and may be older. The excavator, Claudia Maria Melisch, dates the settlement to “about 1150” and warns against reading the dates as exact years.



Every dated record, on one time scale
in the groundin writinga building · one linear scale; “about” dates drawn open
Petriplatz · excavated from 2007
Radiocarbon puts the two oldest of 3,223 graves no later than 1160: at least 77 years before any document names the town. Settlement began around 1150.
1237, written down 1238
In 1237, at Brandenburg, the margraves and the bishop settled a tax dispute. One witness was “Symeon plebanus de Colonia”, Cölln’s priest. The record, written in 1238, is no founding charter.
1244 · 1253
Symeon reappears in 1244 as provost of Berlin: the first record of the second town. By 1253 Berlin’s own town law was being given to Frankfurt (Oder).
1307 · 1342
In 1307 Berlin and Cölln formed a union to defend their rights against the margrave. A joint town hall on the Lange Brücke, the bridge between them, is first referred to in 1342.
1320–1411
The Ascanians died out in 1320. Wittelsbachs ruled from 1323 to 1373, Luxembourgs until 1411, when the Hohenzollerns were named its administrators. The towns, 6,000–7,000 strong, often led the Mark’s town leagues.
1432 · 29 August 1442
In 1432 the towns agreed to merge. In 1442 Friedrich II took the keys of the four gates and undid the union. On 29 August the towns ceded a castle site, their town hall and their high court.
31 July 1443 – spring 1451
Friedrich laid the foundation stone on 31 July 1443, on the Spree island beside Cölln. Finished in the spring of 1451, it became his main residence.
1447/48 · 18 June 1448
At the turn of 1447/48 citizens flooded the building site, drove out the elector’s officials and destroyed his documents. On 18 June 1448 they submitted again, and lost their mills and tolls too.
1452 · 1518
The towns had begged their Hanse allies for help, in vain. In 1452 they wrote bitterly to Lübeck that they were leaving the league; the exit was completed only in 1518.
02Two towns, one river
The towns grew rich on trade. Rich and poorer citizens alike shipped their grain, “siligo que dicitur de Berlyn”, to Hamburg and Flanders and sold it at a profit. The Spree, Havel and Elbe led to Hamburg and the North Sea; a short land route over the Oder led to Stettin and the Baltic.
By the 14th century Berlin-Cölln had 6,000–7,000 inhabitants and led the Mark politically. No picture of the medieval towns survives: the engraving here is how an artist imagined them in the nineteenth century.

031442–1518
The famous defeat came in 1448, but the decisive surrender came six years earlier. According to a later source, Friedrich appeared before the town with 600 horsemen and had the gates opened.
The town council went on, but the elector now confirmed its elections. Even the Hanse exit took decades: declared in 1452, completed in 1518.
What the towns gave up, and when
Schulz: the 1442 treaty and the 1448 submission; the Hanse exit. Filled dots: given up to the elector. Open: the Hanse. One linear scale.
04The town seal
Berlin’s oldest known seals, from 1253, carry the margrave’s eagle. The second seal, of 1280, adds two bears holding the eagle’s shield. After 1448 the seal was recut: the eagle now stood on the bear’s back, wings spread, talons out, and the bear hung out its tongue under the weight.



Each seal’s date on one linear scale. The third type is dated “after” the Unwille: the source gives no exact year.
05Berlin-Mitte today
The Nikolaikirche, Berlin’s parish church, is the oldest: its fieldstone tower base survives from the first church; the rest was destroyed in 1945 and rebuilt in the 1980s. The Marienkirche, first documented in 1292, is still a parish church.
Berlin’s rise as a capital came only some 250 years later, from about 1700. The nineteenth century turned the towns’ defeat into legend: in Willibald Alexis’s novel of 1840, the elector smashes Berlin’s Roland, symbol of the citizens’ pride, and throws it in the Spree. A copy of another town’s Roland was set up in front of the Märkisches Museum in 1905.



What came next: the Hohenzollerns, five titles in five centuries, from the enfeoffment at Constance on 18 April 1417. And the museum that built Berlin a Middle Ages: the Märkisches Museum.
The first page that names Cölln records a tax dispute. The town was already old.
Press & citation
Free to publish under CC BY 4.0 — in print, online, on Wikipedia and in teaching, commercially or not — with credit to Berlinfographics and a link to this page.
Ready-to-use image
The infographic as one image: headline, key figures, chart, sources and credit, 2,400 × 1,350 px PNG. Please use it unedited.
Download landscape (PNG)
Square format
A 1:1 version for social media and narrow columns, 1,800 × 1,800 px.
Download square (PNG)
Portrait 4:5
For Instagram and LinkedIn feeds, 1,620 × 2,025 px.
Download portrait (PNG)Credit line
Berlinfographics (berlinfographics.com), CC BY 4.0
Citation
Berlinfographics (2026). “Berlin and Cölln, the twin towns”. Berlin Experiences. https://berlinfographics.com/berlin-medieval-foundation/
Wikipedia
{{cite web |title=Berlin and Cölln, the twin towns |url=https://berlinfographics.com/berlin-medieval-foundation/ |website=Berlinfographics |publisher=Berlin Experiences |date=2026-11-09 |access-date=2026-11-09}}
Our infographics, charts and texts are licensed CC BY 4.0: free to republish, including commercially, with credit to Berlinfographics and a link. Photographs keep their own licences, named in each caption. How to credit
Topics: The Second World War · Cold War Berlin · Nazi Berlin · Persecution & the Holocaust · Weimar Berlin · Prussia & the Kaiserreich · Architecture & the built city · Culture, science & society · Reunified Berlin · Unusual facts
Contact: info@berlinfographics.com · Press: press@berlinfographics.com · Imprint · Privacy