Where is a good source for serious math (wall-size) posters? Where is a good source for math wall posters that give glimpses of serious and beautiful mathematics?
I'm a faculty member looking to find some wall posters (e.g. 2 ft x 3 ft) to hang in a handful of display cases around our department. I'd like the posters to be eye-catching and cool (maybe even inspiring!), and also deal with serious mathematics - not be trivial, vague, or snide.
Any ideas?

Try this
http://www.maa.org/programs/students/undergraduate-research/jmm-poster-session/examples-of-outstanding-student-posters
or
http://euler-2007.ch/posters/
or
https://plus.maths.org/content/search/node/POSTER
or google "POSTER MATHEMATICS", ....
