Simple shapes and a few patterns make for endless joy. Rubber stamps now online.
A splendid collection of old posters from Otl Aicher. Via the incredible Plakat Kontor.
Convert the internet into coloured spots, to make it a happier place.
Cymatics are the study of wave patterns. This book from 1797 has many diagrams of the phenomena. Thank you Monoskop.
The hardcore concrete facades of Tehran. An Instagram account.
Pysanka is the Ukrainian art of decorating eggs, using ink and a wax resist. All images via here.