Where is a good source for serious math (wall-size) posters?

Question

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?

Answer 1

One source for posters that may fit your description (though I don't know about the size) could be http://www.ams.org/samplings/mathmoments/mathmoments

Answer 2

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", ....