Following @Artmedieval on Twitter, I've come across a great explanation of the wonderful 'calligrams' from centuries past @PublicDomainRev. The 9th century manuscript Aratea, consists of poetry, text and image, explaining and illuminating the astronomical constellations. Combining science, poetry and art in a beautiful and intriguing way, even the stars' astronomical appearance in the sky is depicted in this work.
Learning new graphic and visual art forms with @ComicsMasterYou, the calligram is a great example of combining words and pictures through interdependence. Just like the best picture books, words and pictures work together to add layers of meaning and enrich the reader's experience.