I’ve noticed a number of older “high-rises,” expecially hotels, which go up only to the 12th floor. Instead of going from the 1st floor thru the 13th floor, they go 1st, Mezzanine, then 2nd thru 12th floor–which is actually 13 floors.
So. . . just in case evil forces noticed that building planners were weasel out of using the number 13, when you actually had 13 floors, you typically had a basement and/or street level, so that you actually had more than 13.
The question: Was going no higher than the 12th floor done because of superstitions, or just a matter of practicality? Or maybe there were just a lot of superstitious planners in my area way back when.