Abstract. Retrospective forensics of the 1969 extreme hydrometeorological events in Tunisia – Tunisia experienced extreme rainfall-flood events in September and October~1969 across most of the country. These events have been gauged and reconstituted in such a detailed manner that they are now the best known extreme events in Maghreb, both because they represent the most important events ever quantified and because many land uses and hydraulic facilities have changed and been set up since then, thus changing regimes. The retrospective forensics of these events are much valuable not only in terms of hydrological and geomorphological knowledge, but also in terms of actual and future water and infrastructure management as many dams, overexploited groundwater, human settlement and security stakes are now depending and vulnerable to such possible events in the future.