Some of my own favorites from this year's Bridges mathematical art gallery:

Fielding Brown's 3d Lissajous wood ribbon sculpture, http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings/fieldingbrown

Diana Davis's periodic pentagonal billiards patterns,

http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings/ddavis

Stephen Kenney's illustration of triangle geometry,

http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings/stephen-kenney

Elizabeth Paley's stoneware Klein bottle,

http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings/espaley

Anduriel Widmark's knotted glasswork

http://gallery.bridgesmathart.org/exhibitions/2019-joint-mathematics-meetings/anduriel-s-widmark