It is amazing that a book printed so long ago is technically applicable centuries after it was written.  Did I understand that correctly?  I doubt that the measurements are still valid, since the units we use now have only recently been standardized, but otherwise - am I correct that this book is not just a pretty picture that architects like to copy?  (I dearly hope that made sense!)

Now, running the risk of sounding like my son when he was in elementary school  ~~  a "social toilet"?