The Line, The Crack, And the Possibility of Architecture: Figure, Ground, Feminist Performance‪.‬

[E]very cavity must be filled and no pocket left empty; [El one of the reasons for this is to prevent any creature from gaining access and making nests there or accumulating filth and seeds, which might result in the wild-fig sprouting from within the wall. I have seen an incredible weight, a whole mass of stone, disturbed by a single root. (Leon BattistaAlberti, On the Art of Building 73)