It is easy to visit it the way you visit a stage set: coloured façades, wooden alleys, souvenir shops. But the building was not designed for you to look at, it was designed to hold a mountain of fish.
And that commodity explains the whole city: why it is where it is, why it was the country's largest until the 1830s and why part of it spoke German.
01 Fish that dries without salt
It helps to start with the product, because this is not salt cod. It is fish split and hung on wooden frames in the open air, on the northern coast, where late-winter air is cold, dry and windy: it neither freezes solid nor rots.
The result loses most of its water, ends up hard as a board and keeps for years with no salt, no cold and no packaging. For a medieval economy that is close to magic: food that does not spoil and that weighs little for the protein it carries.
The key is the saving on salt. Salting fish requires a lot of salt, and in northern Europe it had to be imported. Air-drying costs nothing but time and the right climate, and the right climate was exactly up there.
Food that lasts years, needs no salt and travels well. The whole city was built on that.
02 Why everything passed through here
The fish was dried a thousand kilometres away, but it was sold here. Exports begin around the year 1100, and in the 13th century the crown granted this city the monopoly on trade with the north of the country.
Those exclusive rights to mediate between the north and abroad lasted until 1789. That is, for over five hundred years an Arctic fisherman could not sell his catch to a European buyer without going through this wharf.
Everything else follows from that. Dried fish was the reason the city became one of northern Europe's largest trading centres and remained the country's biggest until the 1830s.
03 A quarter with its own language
Around 1350 one of the four great trading offices of the league of German Baltic merchants was established here, and the wharf became the centre of its activity in the country. Hence for centuries it was called the German wharf.
The merchants lived in their own quarter, apart from the rest of the city, and Middle Low German was spoken there. They held exclusive rights to trade with the northern fishermen, and organised their entire lives inside these wooden rows.
That is the detail that changes the visit. You are not in an old quarter of the city: you are in what was a foreign trading colony with its own rules, wedged inside the port and running that way for four hundred years.
04 And every few decades, fire
An entire city of wood, with warehouses full of dry goods and stoves inside, has an obvious problem. This one burned again and again, and not in a minor way: in 1702, ninety per cent of the city burned.
It was not the only one. There were great fires in 1751, 1756, 1771, 1901 and 1916, and in 1955 another part of the wharf itself burned, on whose cleared ground a museum was later built.
And here is the interesting part: each time it was rebuilt on the same layout. The plots, the passages and the orientation of the buildings were repeated fire after fire, so that what you see is relatively recent timber laid out on a medieval organisation of space.
05 How one of these warehouses is built
The logic of the whole is a port's, not a street's. The buildings sit perpendicular to the water, narrow and very deep, in parallel rows, and between each two rows runs a plank passage from the wharf to the back of the plot.
That arrangement answers a simple need: every load must get straight from the boat into the interior without crossing the city. The passage is the unloading corridor, and the upper storeys project over it to gain storage area.
The gables you see from outside, all identical and narrow, are not an aesthetic whim: each one is the front of a different building. You are looking at the end wall of a row of warehouses, counted one by one.
06 What to look for
First, leave the façade. The photograph is taken from the wharf, but the building is understood by walking into one of the side passages: there you see the real depth of the buildings, the overhanging galleries and the plank floor.
Second, look for the pulleys and the high doors. On the upper floors there are loading openings that lead to no staircase: they were for hoisting bales from below. They are the proof that this was a warehouse and not a home.
And third, look at the ground and the lean. Much of the complex sits on land taken from the sea and on centuries of fill, and the buildings have gradually gone out of true. That visible lean is the age of the place, told in timber.
