Roman de Brut (c. 1155) was based on the Historia Regum Britanniae of Geoffrey of Monmouth.

Wace narrates the founding of Britain by Brutus of Troy to the end of the legendary British history created by Geoffrey of Monmouth.

The popularity of this work is explained by the new accessibility to a wider public of the Arthur legend in a vernacular language.

[11] His later work, the Roman de Rou, was, according to Wace, commissioned by Henry II of England.

[12] A large part of the Roman de Rou is devoted to William the Conqueror and the Norman Conquest of England.

Wace's reference to oral tradition within his own family suggests that his account of the preparations for the Conquest and of the Battle of Hastings may have been reliant not only on documentary evidence but also on eyewitness testimony from close relations – though no eyewitnesses would have been still alive when he began work on the text.

There is a granite memorial stone to Wace built into the side of the States Building in Jersey's Royal Square.