The Guelph Annals of Piacenza is a Latin chronicle of Piacenza and Lombardy for the years 1031–1235, written by Giovanni Codagnello.
The "Annals" is found in the manuscript Paris, Bibliothèque nationale, lat. 4931, at folios 70c–105c. The title of the work is a modern convention. Alphonse Huillard-Bréholles called the text the "Chronicon Placentinum" for his edition, while for his Georg Pertz called it the "Annales placentini guelfi" to distinguish it from the chronicle he called "Annales placentini gibellini". The name "annals" is less accurate than the qualifier "Guelph". The "Annals" is a substantial narrative history, more properly called a chronicle.
The first annalistic entry—the death of Bishop Siegfried—is erroneously dated to 1012, when it in fact took place in 1031. The "Annals" is certainly written from a Guelph perspective, typical of the city of Piacenza. The Guelphs opposed the efforts of the Holy Roman Emperors to increase their power in the kingdom of Italy. They supported the Lombard League and the Papacy against the emperors. Codagnello is known to have campaigned for the restoration of the league in 1226.
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