In the session of September 21, 1792, Collot d’Herbois proposed the abolition of the monarchy. After some debate, the proposal was unanimously accepted, the reservations of Quinette having aroused disapproving murmurs. The transition to theRepublic, however, created a vacuum, and not only because the executive power had to be reconstructed. In these newcircumstances, would the president of the Convention retain his same role, the same powers, and the same image of his predecessors ? To study the ninety-one deputies that at one time or another occupied the presidency of this revolutionary assembly involves not only examining their social origins, their convictions, their powers, but also considering the means these men possessed to ensure that debates remained orderly and calm.