Armentarius of Pavia was an 8th-century Catholic bishop who led the diocese of Pavia from 711 until his death in 732. Born in the Kingdom of the Lombards, he succeeded Bishop Damian. His tenure was defined by a significant jurisdictional conflict with Benedict, the Bishop of Milan. While Milan claimed authority over Pavia, Armentarius successfully argued that his see was directly subject to Rome, a position supported by Pope Constantine.