1225–40) was a trouvère from Reims, possibly a painter (peintre), but that may just be a family name.
Eustache addressed one of his songs, "Amours, coment porroie chancon faire", to Guigues IV, Count of Forez and Nevers.
Guigues participated in the Barons' Crusade of Theobald I of Navarre in 1239 and died in 1241; Eustache's poem was probably written during this time.
All of Eustache's poems are in isometric decasyllables; stanzas are usually eight lines in length with two rhymes.
He must have participated in puys, for his "Force d'Amours me destraint et mestroie" is labelled a chanson couronnée (crowned, i.e. prized, song) in one of the manuscripts.