Tangled Alphabets is an exhibit at MoMA that features artists Leon Ferrari and Mira Schendel. It was by far one of my favorite exhibits at the museum because it was unlike anything I'd ever seen. Their pieces' detail and the conceptual imagery are mind-bogglingly complex. Their works "address language as a major visual subject matter: the visual body of language, the embodiment of voices as words and gestures, and language as a metaphor of the worldly aspect of human existence through the eloquence of naming and writing. They produced their works in the neighboring countries of Argentina and Brazil throughout the 1960s and 1980s, when the question of language was particularly central to Western culture due to the central role taken by post-structuralism, semiotics, and the philosophy of language. Although their drawings, sculptures, and paintings are contemporary with the birth of Conceptualism, they are distinctively different, and have not yet been exhibited in their entirety in the United States." (moma.org)
You can see more of their stunning pieces on the exhibit's website.