Koldinghus is only two hours drive away and always worth a visit, we may go there.
https://www.realdaniabyogbygklubben.dk/media/0jcob5zq/dennis-borup-koldinghus-oppefra_.jpg
https://www.kongernessamling.dk/wp-content/uploads/2020/12/kh.jpg
https://www.visitkolding.dk/sites/visit-kolding.com/files/2019-08/Koldinghussetoppefra.jpg
https://upload.wikimedia.org/wikipedia/commons/8/8b/Kolding_-_Koldinghus3.JPG
The style of the castle is typical for the Baltic/Northern European brick castles of the 12-1400s.
A simple layout with a courtyard surrounded by massive buildings and a large keep (the tower). No curtain wall and no crenelations on the walls or on the top of buildings. Except for the top of the keep. Instead there was a sentry-walk on the top floor right beneath the roof.
The reason was simple, the sentries were protected against the elements, and to a large extant also the cold and they would remain unseen by enemies watching the castle. It also meant that it was very difficult to estimate the size of the garrison and where the defenders were positioned.
The windows are modern. Originally brick castles were very forbidding to look at, there were only shooting slits for crossbows. Crossbows was the main shooting weapon in this part of Europe, rather than bows. Bows were for hunting and required way too much time to become proficient, while a crossbow, even the large military ones, could be used by any average person, even women and adolescents - and you could take as long as you needed to wait and aim a crossbow.
But back to windows. Windows faced towards the courtyard and many castles had elaborate galleries facing the courtyard it was in the courtyard that things happened. - Outside the castle, well, that's just trees, and fields and a fjord and the town. Pretty uninteresting at the time.
The gate or rather gateway is placed opposite the keep and that pretty much the only way to get in, because trying to scale the castle elsewhere only meant that an attacker ended up on a slanting roof at the mercy of the crossbowmen in the keep. And if you managed to get through the gate, the defenders would retreat to the keep and keep fighting from there.
So brick castles are deceptively simple but very efficient fortifications.
If you look at the airphoto, you will notice a number of towers inside the courtyard, that's stair-towers. The only stairs at all inside such a castle, stairs being a weakness. So the turn of the stairs were designed to make it difficult for the attackers to use their weapons on the way up, while the defenders had much more room to use theirs.
And the air-photo you will in the lower left corner see a bit of masonry protruding, that's one of the privies.
A castle like this could be held and was held by an astonishingly small garrison. 15-20 men-at-arms would be sufficient to withstand anything but the most overwhelming attacks.
Kolding is a charming medieval town, with lots of small houses and narrow winding streets. Being located at the bottom of a fjord-valley it's actually quite easy to lose your orientation and get lost in the streets, because you can't see very far and the closeness of the buildings blocks any high reference points.
