Look! Old Building Drawings

Look what our neighbor found in the basement of our building! They're old building drawings for our home and they've been so much fun to sift through...

That, up top, that's our entry doors. And that drawing above details and specifies our windows. While these aren't the original design drawings, they do give us lots of clues to repairs done on the building decades ago. Has anyone else discovered any archaeological "artifacts" about their homes?