The architectural peculiarities of the Bent pyramid built by Snefru at South Dahshur are the subject of two currents of interpretation. The first one consists of seeing the symbolic and deliberate expression of a duality in the design, and the second one, modifications due to structural problems that occurred during the construction work. This article reviews the archaeological situation by bringing unpublished and additional observations into the discussion. Some details that have been unnoticed by commentators so far, as well as a structural pathology of the building, lead to confirmation that the builders changed their project several times, but also reveal the reasons for these changes. A complete revision of the history of the monument is then suggested as a conclusion.