Jheronimus walked up these worn-out steps in the Middle Ages. The different layers of paint show that the stairs were painted several times over the course of time. There was probably also a runner over the stairs at one time. This would explain why the steps are not completely painted.
And then when you get to the second floor you see a wall from 1420 with a niche in it. The niche was once a window. The semi-circular brickwork above the niche forms what is known as a "relief arch. A relief arch was built over a wall opening (usually a window or door opening) to distribute the weight of the masonry above it over both sides of the opening. After the window was bricked up, a flue was put in front of it in the 19th century. You can see this by the black sections on the wall. On the right you can see another flue. This channel does date back to the Middle Ages.
Another couple of well-preserved gems are the so-called "key pieces" (consoles) under the beam heads. The place where a beam lies in the wall is a vulnerable point. A reinforcement is therefore welcome. The key piece is a carved piece of solid wood under the beam. Here, these key pieces have carvings on the underside in the shape of an Acanthus leaf.