Ask for directions to Oslo's old town and you may get two different answers. One points east, to Gamlebyen, where the medieval city stood. The other points to the tidy grid of streets below Akershus Fortress, where the city was rebuilt in the 1600s.
Both answers are right, which is exactly what makes the place interesting. Old town Oslo, Norway, is less a single postcard district than a story told in two locations, with a fire in between.
This guide walks through both, explains what you are actually looking at, and suggests a route that connects them in an easy half day.
Why Oslo has two old towns
For most of the Middle Ages, Oslo sat at the mouth of the Alna river, on the slope below Ekeberg. In 1624 a fire destroyed the town, and King Christian IV of Denmark–Norway decided not to rebuild it there.
He moved the city west, close under the walls of Akershus Fortress, laid out a new grid of straight streets, and named it after himself: Christiania.
The burnt-out medieval site did not vanish. It carried on as a small suburb that kept the name Oslo, while the capital was called Christiania and later Kristiania. Only in 1925 did the whole city take back the old name.
So when Norwegians say Gamlebyen, they mean the medieval area in the east. When visitors say old town, they often mean Kvadraturen, the 17th-century grid. Knowing that difference saves a lot of confused wandering.
Gamlebyen, the medieval city
Gamlebyen is the oldest urban area within today's capital. Snorri Sturluson's saga history says King Harald Hardrada founded the town around 1050, but excavations show that an urban settlement was already taking shape at the end of the Viking Age, around the year 1000.
The town grew into a church and royal centre. Late in the 11th century, King Olav Kyrre made Oslo a bishop's seat, and its golden age came in the early 1300s under Haakon V, the king who also began Akershus Fortress in 1297.
For the deeper background on those first centuries, our piece on the Viking Age foundations of Oslo is a good companion.
What makes Gamlebyen unusual today is how much of it is protected. Building is restricted over large areas because ruins and cultural layers still lie above and below ground. Much of the medieval city is not lost; it is simply underfoot.
What to see in the medieval quarter
Start at Minneparken, the memorial park that opened in 1932. Its centrepiece is the ruin of St. Hallvard's Cathedral, begun in the early 12th century and named after Oslo's patron saint.
For around five centuries it was the religious heart of eastern Norway. Kings were crowned, married and buried here, including Sigurd the Crusader, who was laid to rest in the chancel around 1130. The cathedral stayed in use until the mid-1600s before falling into ruin.
The park also holds the remains of the Dominican St. Olav's Monastery and the small Romanesque Holy Cross Church. Expect low walls and foundations rather than towers. The pleasure here is in reading the outlines.
A short walk away is Middelalderparken, the Medieval Park, opened in 2000. Here you find the ruins of St. Clement's Church, St. Mary's Church and the old royal estate.
The park's water is laid out roughly where the shoreline of the Oslofjord ran around the year 1300. Standing at its edge, with modern Bjørvika rising behind, you get a rare sense of how close the medieval town sat to the sea.
Across Bispegata stands Oslo Ladegård, a baroque manor house built in 1725 on the site of the old bishop's palace. Its cellar hall dates back to the 13th-century palace, and the garden was recreated in 1999 from a plan drawn in 1779.
Nearby, Oslo Hospital was established in 1538 in the buildings of a former Franciscan friary founded around 1290. Gamlebyen Church stands on the same site, partly covering the old friary.
Christiania Torv, the old town square
Now head west to the second old town. Kvadraturen is the area Christian IV planned after 1624, and its original heart is Christiania Torv, the Oslo old town square that gives the grid its focus.
The square sits between Rådhusgata and Øvre Slottsgate. Its shape followed a Renaissance pattern: instead of leaving a single open block, the planners cut a square notch from the corner of each of the four blocks meeting at a crossroads.
The new town got its own cathedral, Holy Trinity Church, in 1639, and its own town hall in 1641. The church was pulled down after another fire in 1686, but the old town hall building, Gamle rådhus, still stands on the square.
In the middle of the square is Wenche Gulbransen's fountain shaped like a large glove. It refers to the story that Christian IV pointed with his glove and declared that the new town would be built right here.
Christiania Torv did not stay the city's main square for long. The market moved to Stortorvet in front of the new cathedral in 1736, and the current name of the square was only adopted in 1958. Even so, it remains the clearest place to see where the planned city began.
For the fuller story of the blaze that made all this necessary, read The Great Fire of 1624 and the Rebuilding of Oslo.
A simple Oslo old town map in your head
You do not need a printed Oslo old town map to link the two areas. Think of it as a straight line along the harbour, with the medieval town at the eastern end and Christiania at the western end.
From Christiania Torv, walk east past the fortress, through the new waterfront district of Bjørvika, and on to Middelalderparken. It is a comfortable walk on mostly flat ground and takes roughly 20 to 30 minutes at an easy pace.
If you would rather ride, trams 13 and 19 run through Gamlebyen on their way up to Ljabru, with a stop at Oslo Hospital. Lines and timetables change from time to time, so check Ruter's journey planner before you go.
A good order is to start in Gamlebyen in the morning, when the ruin parks are quiet, then walk west and finish around Christiania Torv and the fortress for lunch.
The old town you can step inside
There is a third answer to the question, and it is the one that suits a rainy day. Norsk Folkemuseum on Bygdøy has an open-air section called The Old Town, made up of buildings moved from Christiania and its suburbs.
It also includes houses from the coastal towns of Brevik and Kragerø, and an apartment building from Wessels gate 15, with flats furnished to show daily life in different periods.
Where Gamlebyen gives you ruins and Kvadraturen gives you street plans, the museum gives you interiors. Together they make a surprisingly complete picture of how the city lived.
Tips for a better visit
Bring patience for ruins. Medieval Oslo was built largely of wood, and what survives in stone is mostly foundations. A little background reading helps, and the outlines start to make sense once you know which building you are standing in.
Look down as well as up. Street names like Bispegata, the bishop's street, and St. Halvards gate are reminders of the medieval layout. The old market square lay roughly where Oslo gate meets Bispegata today.
Finally, give each area its own pace. Gamlebyen rewards a slow wander and a bit of imagination, while Kvadraturen is compact and easy to read in an hour. Seeing both is the only way to understand why Oslo's past sits in two places at once.
About Sofia Berg
Sofia Berg is a lifelong Oslo resident and travel writer with a passion for uncovering the city's hidden gems. She has been exploring and writing about Oslo for over ten years.