hyperbolic paraboloid in Architecture
http://theory.csail.mit.edu/~edemaine/hypar/

from: http://en.wikipedia.org/wiki/Hyperboloid_structure
from: http://oak.arch.utas.edu.au/projects/view_projectinfo.asp?projID=133
Also this page has some good images:
http://www.recentpast.org/types/hyperpara/index.html
I've driven by this church a number of times in my hometown of Spokane WA:
or this one is closer to ER's location at Venice Florida:
Steve G.
