A long tradition of Franco-Provençal literature exists, although no prevailing written form of the language has materialized. An early 12th century fragment containing 105 verses from a poem about Alexander the Great may be the earliest known work in the language. Girart de Roussillon, an epic with 10,002 lines from the mid-12th century, has been asserted to be Franco-Provençal. It certainly contains prominent Franco-Provençal features, although the editor of an authoritative edition of this work claims that the language is a mixture of French and Occitan forms. A significant document from the same period containing a list of vassals in the County of Forez also is not without literary value.