The dispute about Gallus' birthplace among supporters of Forlì and supporters of Fréjus or of a generic term for "Friuli" is attested since the Renaissance. During the 20th century, Ronald Syme took in consideration Fréjus and Cividale del Friuli, both once called "Forum Iulii", and called the former the more likely. Jean-Paul Boucher recognized at least five candidates, and considered "Forum Iulii Iriensium" (modern Voghera) the most suitable. It has been also suggested that "Foroiuliensis" could refer not to Gallus' birthplace, but rather to the place where he performed a memorable act, namely the erection of the Vatican Obelisk in the "Forum Iulium" of Alexandria, thus making some generic mentions of Gallia as the sole possible clue about his place of origin.