Bonifaci VI de Castellana

1244–1265) was a Provençal knight and lord, one of the last of the great independent seigneurs of the land before the reign of Charles of Anjou (1246).

In the latter half of 1252, he wrote Era, pueis yverns es e.l fil, an attack on clerics (the Papacy supported Charles), Henry III of England (a relative of Charles by marriage), and even James I of Aragon (he did not avenge his father Peter II's murder at Muret).

The pact between Charles and several cities of Piedmont in 1260 provoked another violent poem in the style of Bertran de Born, Gerra e trebailh e brega.m plaz.

There, he penned Sitot no m'es fort gaya la sazos, identical in metre and rhyme scheme with Humils e francs e fis soplei ves vos by Pons de Capduelh.

From Montpellier, he continued into Spain, where he was at Huesca in February 1265, at the court of the infante Peter the Great, arranging an alliance against Charles.