Lu rebellamentu di Sichilia, fully Cronica di lu rebellamentu di Sichilia contra re Carlu, is a Sicilian historical chronicle of the War of the Vespers written around 1290. The anonymous Rebellamentu, probably written at Messina, was ascribed to Atanasiu di Iaci by Pasquale Castorina in 1883. Though the Rebellamentu sometimes adds valuable details to the history of the Vespers, it is frequently untrustworthy. Its monastic provenance is evident in its moralising tone. The antiquity of its language has placed its authenticity beyond doubt, despite its lack of an early manuscript tradition. This has not prevented speculation that it was written contemporarily with events: one verb in one manuscript is found in the first-person present; this may represent the author inadvertently stepping out