Answer by
VB (361)
It comes from Medieval Europe when buildings (mostly churches) had stained glass windows, carved exterior walls or murals which depicted pictures of stories, battlefields, or other historical events. When people would describe a location in the building, instead of using the numerical version, they used the pictured stories to describe it.
I think this is closer to the origin. The different windows told "stories" or pictures. And it evolved from there. Though we may not have stained glass windows, peering into different windows in a home may tell a different story. It's "storey," by the way, if you're British. add a comment