This article considers the place of the Hiroshima bombing and the September 11 attacks as singular acts of violence constituting major points of rupture in the historical consciousness and chronological narratives of the Western world: Ground Zero is Time Zero. Geographically and temporally delineated instances of intense death and destruction, both acts have been construed as moments when the world `changed for ever'. Our schemata of interpretation — the mental frameworks through which we impose meaning and continuity on the world around us and determine the range of our expectations — were violently overthrown by those events, shattered by images that exceed our minds' capabilities of re presentation and symbols that challenge our liberal metanarratives of ineluctable progress. By bringing to the fo re their aesthetic dimension and reading them through the lens of the Kantian notion of the sublime, we can grasp those events in their original intensity as overwhelming revelatory experiences. Apocalyptic both in their imagery and the meaning attributed to them, those unprecedented acts of terror re p resent turning-points in our reconstituted historical narratives, marking a culmination of history leading to it as well as the start of a new era in which it is proclaimed that many previous assumptions no longer hold.