Departing from 9/11’s spectacularity and aesthetical appeal, its eskatastrophic dimension, this book takes up the task of studying 9/11 as a mnemonic singularity, i.e. a catastrophic event that evokes or mimics, albeit in a renewed situation, the structure of past catastrophes. It investigates how 9/11 has been represented/remediated and how it has reintroduced catastrophic thinking into our conceptual framework.