Apollinaire's calligrammes are the direct predecessors of
poésie concrète, establishing the principle that the visual arrangement of words on the page creates meaning independently of and in addition to the verbal content of the text; Eugen Gomringer's "Silencio," a concrete poem arranging the single word "silencio" in a rectangle with a
blank space at the center, demonstrates how the spatial absence
within the text can be as meaningful as the words surrounding it; The Brazilian Noigandres group's 1958 "Pilot Plan for Concrete Poetry" articulated the movement's theoretical basis: the poem as a self-referential verbal-visual-sonic object whose formal properties are inseparable from its semantic content; A student creating a poésie concrète work might take a single word, "chute" (fall), and arrange it on the page so that
the letters actually fall down the page, or gradually decrease in size, making the visual form perform the word's meaning; Ian
Hamilton Finlay, working in English but deeply influenced by French concrete poetry, created poems-as-objects, poems-as-gardens, and poems-as-sculptures, extending concrete poetry's interrogation of the boundary between language and the visual arts into three dimensions; Poésie concrète challenges students to question assumptions about reading: is reading always linear and temporal, or can
a poem be apprehended spatially, all at once, like a visual
image? The concrete poem forces this question by making the answer to both readings simultaneously "yes."