[The threshold] is a zone shaped by precise tectonics, a region of cognition. Passage and peristyle, pronaos and portal, entry and vestibule, triumphal arch, sacred and profane […]: these lines, imaginary and tectonic, do not create boundaries, but the between, a space in the middle. The form of the threshold, as a temporal and spatial figure, is that of the “between-the-two,” of the medium that opens between two things.