Nicene and Post-Nicene Fathers, Ser. II, Vol I:
The Life of Constantine with Orations of Constantine and Eusebius.: Chapter XLVIII

Chapter XLVIII.—Celebration of Constantine’s Decennalia.

While he was thus circumstanced, he completed the tenth year of his reign. On this occasion he ordered the celebration of general festivals, and offered prayers of thanksgiving to God, the King of all, as sacrifices without flame or smoke. 3148 And from this employment he derived much pleasure: not so from the tidings he received of the ravages committed in the Eastern provinces.

Footnotes

Unburnt offerings, meat offerings.