Vicarius Filii Dei
Vicarius Filii Dei (Latin: Vicar or Representative of the Son of God) is a phrase first used in the forged medieval Donation of Constantine to refer to Saint Peter, a leader of the Early Christian Church and regarded as the first Pope by the Catholic Church. Its interpretation has been disputed, at times, during the past four centuries.
Catholic apologists answer the Protestant claims by noting that “Vicarius Filii Dei” has never been an official Papal title. They also argue that even if it were a Papal title, that wouldn’t be sufficient to associate the Pope with the number of the Beast, as, for example, the name of Ellen Gould White can also be similarly manipulated to get the same number (ELLen GoVLDVVhIte 50+50+5+50+500+5+5+1=666). Adventists however have responded to Roman Catholics by pointing out that the number 666 is the number of a man (Revelation 13.18), Ellen White was a woman and thus this calculation cannot apply to her. In fact, the Greek word translated of a man is ἀνθρώπου (anthrṓpou) of a human being, and can be applied to either sex. Adventists also note that in Latin and Roman numerals there was no “w” with a value of 10, although “u” was a late mediaeval modification of “v“, and it was normal to treat the two letters as equivalent. Historically “w” originated as a double “u” or double “v”, and is treated as numerically equivalent to 10 in old chronograms.
Catholics answer the claims that “Vicarius Filii Dei” is written on the Papal Tiara by stating that a simple inspection of the more than 20 papal tiaras still in existence—including those in use in 1866 during the reign of Pope Pius IX when Uriah Smith made his claim—shows that none have this inscription, nor is there any evidence that any of the earlier papal tiaras destroyed by invading French troops in 1798 had it.