Joan de Castellnou

His most famous works are non-lyric, however: a grammar (compendi) called Las flors del gay saber, estier dichas las Leys d'amors and a glossary (glosari) on the Doctrinal (1324) of his predecessor, Raimon de Cornet.

His Leys, however, is the latest and largest medieval Occitan grammatical treatise written with intention of preserving the literary form of the language.

Its double title indicates the close relationship in the medieval lyrical tradition between the science of poetry (gay saber) and the art of love (amors).

It was probably commissioned by the Consistori to be a compendium of grammatical knowledge for a wide audience and to "unveil" the secret art of poetry.

[2] A parallel has been noticed between the Leys and the prologue of the Libro de Buen Amor of Juan Ruiz.

Joan's text is the prose text at the top. Raimon's text is the verse on the bottom.