The Chanson de Guillaume, also called Chançun de Willame (English: "Song of William"), is a chanson de geste from the first half of the twelfth-century (c.1140,[1] although the first half of the poem may date from as early as the eleventh century;[1][2] along with The Song of Roland and Gormont et Isembart, it is considered one of three chansons de geste whose composition incontestably dates from before 1150[3]). The work is generally considered to have two distinct halves: the first tells of Guillaume of Orange, his nephew Vivien and the latter's young brother Gui and their various battles with Saracens at L'Archamp; in the second half of the poem (after 2000 lines), Guillaume is aided by Rainouard, a giant.