Raimon Vidal de Bezaudu(n) (Catalan: Ramon Vidal de Besalú) (flourished early 13th century) was a Catalan troubadour from Besalù. He is notable for authoring the first tract in a Romance language (Occitan) on the subject of grammar and poetry, the Razós de trobar (c. 1210), a title which translates as "Reasons (or Guidelines) of troubadour composition". He began his career as a joglar and he spent his formative years at the court of Hug de Mataplana, which he often recalls fondly in his poems and songs.
In the Razós, Raimon distinguishes the "parladura francesa" (French) from the "cella de Lemosin" (Occitan). He also discusses the art of the listener (li auzidor) and his responsibility to understand the troubadour works. Raimon's insistence that the audience understand what is sung and that they keep silent during its singing has been regarded as seminal in the history of classical music. To him, listeners have a responsibility to enquire about what they do not understand (which is "one of the wisest things in the world") and to be true to the quality of the work, praising greatness and condemning poor form. Vidal also took pains to argue for the superiority of lemosí (or Lemozi, i.e., Occitan) over other vernaculars, prompting the Florentine poet Dante Alighieri to write a De Vulgari Eloquentia justifying the use of the Tuscan vernacular as opposed to the Occitan. The Razós ends with an Occitan-Italian glossary. Late in the 13th century, Terramagnino of Pisa wrote a condensed verse form of the Razós. Jofre de Foixà wrote an expanded version, the Regles de trobar, for James II of Sicily.