|Bishop of Rome|
|Papacy began||1 March AD 492|
|Papacy ended||19 November AD 496|
|Born||Roman Africa or Rome|
|Died||19 November 496|
Rome, Ostrogothic Kingdom
|Feast day||21 November|
|Other popes named Gelasius|
Pope Gelasius I was the bishop of Rome from 1 March 492 to his death on 19 November 496. Gelasius was a prolific author whose style placed him on the cusp between Late Antiquity and the Early Middle Ages. His predecessor Felix III employed him especially in drafting papal documents. During his pontificate he called for strict Catholic orthodoxy, more assertively demanded obedience to papal authority, and, consequently, increased the tension between the Western and Eastern Churches.
There is some confusion regarding where Gelasius was born: according to the Liber Pontificalis he was born in Africa ("natione Afer"), while in a letter addressed to the Roman Emperor Anastasius he stated that he was "born a Roman" ("Romanus natus"). J. Conant opined that the latter assertion probably merely denotes that he was born in Roman Africa before the Vandals invaded it.
The Papal election of Gelasius on 1 March 492 was a gesture of continuity: Gelasius inherited the conflicts of Pope Felix III with Eastern Roman Emperor Anastasius and the Patriarch of Constantinople and exacerbated them by insisting on the obliteration of the name of the late Acacius, Patriarch of Constantinople, from the diptychs, in spite of every ecumenical gesture by the contemporaneous Patriarch Euphemius (q. v. for details of the Acacian schism).
The split with the Emperor and the Patriarch of Constantinople was inevitable, from the Western view, because they adopted the Monophysite heresy of Jesus Christ having only a Divine nature. Gelasius authored the book De duabus in Christo naturis (On the dual nature of Christ), which described Catholic doctrine in the matter. Thus Gelasius, for all the conservative Latinity of his style of writing, was on the cusp of Late Antiquity and the Early Middle Ages.
During the Acacian schism, Gelasius advocated the primacy of the See of Rome over the universal Church, both East and West, and he presented this doctrine in terms that became the model for successive Popes, who also claimed Papal supremacy because of their succession to the Papacy from the first Supreme Pontiff, Peter the Apostle.
Closer to home, after a long contest Gelasius finally suppressed the ancient Roman festival of the Lupercalia, which had persisted for several generations among a nominally Christian population. Gelasius' letter to the Senator Andromachus treated the primary contentions of the controversy and incidentally provided some details of the festival, which combined fertility and purification, that might have been lost otherwise. Although the Lupercalia was a festival of purification, which had given its name "dies februatus", from "februare" ("to purify"), to the month of February, it was unrelated to the Feast of the Purification of the Blessed Virgin Mary, also commonly denominated "Candlemas", which latter feast commemorates the fulfillment of the Holy Family's ceremonial obligations pursuant to Mosaic law 40 days after the birth of the first son. In the instance of the Holy Family, that occurred 40 days after Christmas, scire licet, on 2 February.
Gelasius was the most prolific author of the early supreme pontiffs. A great mass of his correspondence survives: 42 letters according to the Catholic Encyclopedia, 37 according to Rev. Philip V. Bagan and fragments of 49 others, which are archived in the Vatican and that expound to Eastern bishops the primacy of the Roman pontiff. Additionally, 6 treatises are extant that bear the name of Gelasius. According to Cassiodorus, the reputation of Gelasius attracted to his name other works not by him.
The most famous of pseudo-Gelasian works is the list De libris recipiendis et non recipiendis ("On books to be received and not to be received"), also denominated the Decretum Gelasianum, which is believed to be connected to the pressure for orthodoxy during his pontificate and intended to be read as a decretal by Gelasius on the canonical and apocryphal books, which internal evidence reveals to be of later date. Thus the determination of the canon of Sacred Scripture has traditionally been attributed to Gelasius.
In the Latin Catholic tradition, the pseudo Gelasian Sacramentary is in fact a liturgical book that was derived from Roman sources and transcribed, with inclusion of native Gallican liturgical elements, near Paris in the middle of the 8th century AD. While including the texts of some prayers that Gelasius composed, he was not a principal author or compiler of the book. The manuscript (Vatican, Vatican Library, Reg. lat. 316 + Paris, National Library, ms. lat. 7193, fol. 41-56) is actually titled the Liber sacramentorum Romanae ecclesiae (Book of Sacraments of the Roman Church). The attribution to Gelasius is premised in part at least on the chronicle of the Supreme Pontiffs that is denominated the Liber Pontificalis, which states of Gelasius that he "fecit etiam et sacramentorum praefationes et orationes cauto sermone et epistulas fidei delimato sermone multas" ("he also made prefaces to the sacraments and prayers in careful language and many epistles in polished language regarding the faith"). An old tradition linked the book to Gelasius, apparently based on the ascription of Walafrid Strabo to him of what evidently is this book.
Cardinal Giuseppe Maria Tomasi quoted a portion of a missal that was attributed to St Gelasius in the Mass that was entitled 'Contra obloquentes' and published it. The section read: "Grant, We beseech Thee, O Lord, that we do not trouble ourselves about the contradiction of spurious minds, but once that very wickedness has been spurned let us pray that you suffer us neither to be frightened by the unjust criticisms, nor to be attracted to the insidious flatteries, but rather to love that which Thou dost command ...". In 1751, Pope Benedict XIV published this quotation within his Apostolic Constitution "Providas" that attacked freemasonry.