Titus Fulvius Iunius Quietus (died 261) was a Roman usurper against Roman Emperor Gallienus.Quietus was the son of Fulvius Macrianus and a noblewoman, possibly named Iunia. According to Historia Augusta, he was a military tribune under Valerian, but this information is challenged by historians.He gained the imperial office with his brother Macrianus Minor, after the capture of Emperor Valerian in the Sassanid campaign of 260.