My friend has proposed that the buildings in the images below have been sinking into the ground over time and that they're not planned with basements.
He thinks that the bottom of the building was once been at ground level and that some of them have windows and doors left from the past. I'm skeptical to this, I can't possibly think that a building can sink two floors down in the ground.
He's arguing that so many old buildings with basements have "misplaced" windows too close to ground level. I'm thinking that it's not possible to have windows or doors underground, as that would pose a risk for mold, water damage, and shattered windows, not to mention the fact that a building would sink 3 or more meters into the ground, how would the engineers not be able to design a foundation that is not able to support the weight of the building.
We really need an answer to this, we're not engineers, and can't find any information online. Please leave sources as well if possible, thanks!
Here is an image
More images can be found at https://imgur.com/a/kdk7AH0
EDIT: When doing a reverse image search for one of the images, it leads me to some conspiracy theory called mud flood, it's the most stark image of them all where it looks like the building has sunken 8 meters into the ground or more it can't have possibly been built like this. Reverse image search on google