Stairs

Stairs have a standard ratio of run to rise.  I am not sure exactly when this was determined, but I can say that the Louvre was  built before then.  I found myself always not getting my foot in the right position.  We stayed in a very nice apartment in Bern these last two nights that was apparently an older building and not built to the current standard.   A couple of Parisian restaurants had stairs that were clearly not new enough.

You really appreciate the value of the standard when you are not completely recovered from brain damage and trying to walk those stairs