Abstract
On January 15 1975, Eugène Guillaume's statue " Saint Louis rendering justice under his oak tree ", installed in 1877 in the Saint-Louis gallery of the Court of Cassation at the Palais de Justice in Paris, was targeted by a bomb attack. Why did GARI activists consider it to be " the historic image of state 'justice' " ? The investigation begins with a classic textual archaeology, from Joinville'sL'Histoire de Saint Louis to the exaltation, under the reign of Louis XIV, of the motif of the tree of justice, likely to naturalize and root in the nation the very notion of sovereign justice. But it then follows the plant trail. Firstly, to place this oak in the Vincennes forest and in the natural history of places of power. Secondly, to capture it in the symbolic thinking of the Middle Ages, whose tree of knowledge classifies forest species according to their political roles. More than the biblical motif of Jesse's tree, it's this logical arborescence that enables us to think about begetting and transmission from the imaginary of the genealogical tree. But if there are sovereign trees, there is no king of trees, and some, like the elm, may also harbor a communal conception not only of the exercise of justice, but of a political community regulated by the control of speech.