INSCRIPTION _etched glass at left entrance door panel: "Io non so ben ridir com'i' v'entrai" _Dante, The Divine Comedy -- "I do not know how I entered / I do not know well how to recount how I entered there" | plan abstraction of Monolith corner relative to the oblique southeast-northwest line -- additional references: mathematical Vantongerloo de Stijl painting title, North, 1:4:9 and root-5 proportional system