The first image was a warm up for pen work. Just some designs. Perhaps, they are windows, dias* or portals. (* I'm not sure if the plural is "dia", "dias" or "diases".)
The next two pictures are of towers. Each tower is drawn in profile and then top down. The profile is 1 square equals 10 feet while the overhead view is in 5 feet per square.
These towers are strange because the exterior of the castle is to left and there is no windows on the ground floor. I need to draw in stairs next. I love the detail on the doors. There is a main door plus two gates to bar it from opening. In this rendition, the fifth floor has no windows at all.
Both need a top floor.
Anyway, it's late at night. That might explain the strange pink cast to the images. I didn't use a flash.