One musical witness to the tumultuous period in France surrounding the fall of the Capetian dynasty and the rise of the Valois line in 1328 is the motet Servant regem / O Philippe [Ludovice] / Rex regum, preserved in the Roman de Fauvel. Heretofore unrecognized features of this piece place it squarely in the category of royal entrance motet. The tenor has a particularly interesting story to tell, too; its melody reveals that the composer hails from northeastern France and strongly suggests that this person is Philippe de Vitry. Part of the Department of Musicology Distinguished Lecture Series.