Mutinensis gr. 122 is a 15th-century codex written in Greek, stored in the Biblioteca Estense in Modena, Italy. The designation "Mutinensis gr. 122" is modern, the codex itself bearing the title Epitome of Histories () as it contains a copy of the work of the same name by the 12th-century Byzantine historian Joannes Zonaras. Zonaras's work is a chronicle of world history, focusing on the Roman and subsequent Byzantine Empire up until the ascension of Emperor John II Komnenos in 1118. The Modena codex also features additional work by two later scribes, extending the codex to cover Byzantine history after John II up until the Fall of Constantinople in 1453.