 Radulphus Brito († 1320/21) was an important thirteenth-century master of arts at the University of Paris. He was part of the group of medieval masters who later came to be known as the modistae, principally because of their common appeal to the notion of modes of signifying (modi significandi) in their accounts of grammatical congruence. Brito’s philosophical work is largely unexplored, even though it is a crucial link between the philosophical discussions of the thirteenth and the fourteenth centuries. Among other things, he richly contributed to the development of medieval logic and philosophy of language. In fact, one can fairly consider his logic of intentions to be the pinnacle of the development of thirteenth-century Aristotelian logic. Brito was a prolific author, who commented on nearly all the Aristotelian corpus. Almost his entire philosophical work is extant, although most of it is unedited.