The Chronography of 354 records that a Christmas celebration took place in Rome in 336.<ref name="Chrono354">The manuscript reads, ''VIII kal. Ian. natus Christus in Betleem Iudeae.'' "[http://www.tertullian.org/fathers/chronography_of_354_12_depositions_martyrs.htm The Chronography of 354 AD. Part 12: Commemorations of the Martyrs]," ''The Tertullian Project''. 2006.</ref> The creation of the feast may be a response to the Trinitarian controversy that was raging at the time. It was introduced to the Eastern Roman Empire after the death of Emperor Valens, who favored the [[Arian]] heresy, in 378. Christmas has a unique three-mass liturgy that gives a priest three opportunities to inveigh against heretics. Once Arianism died out, the status of Christmas declined. | The Chronography of 354 records that a Christmas celebration took place in Rome in 336.<ref name="Chrono354">The manuscript reads, ''VIII kal. Ian. natus Christus in Betleem Iudeae.'' "[http://www.tertullian.org/fathers/chronography_of_354_12_depositions_martyrs.htm The Chronography of 354 AD. Part 12: Commemorations of the Martyrs]," ''The Tertullian Project''. 2006.</ref> The creation of the feast may be a response to the Trinitarian controversy that was raging at the time. It was introduced to the Eastern Roman Empire after the death of Emperor Valens, who favored the [[Arian]] heresy, in 378. Christmas has a unique three-mass liturgy that gives a priest three opportunities to inveigh against heretics. Once Arianism died out, the status of Christmas declined. |