Barring my faulty memory (and if I’m not lazy) I want to post prayers on Monday from all over Church History and then throughout the modern day, and then my own. This one comes from Licinius via Lactantius.
Supreme God, we beseech Thee; Holy God, we beseech Thee; unto Thee we commend all right; unto Thee we commend our safety; unto Thee we commend our empire.
By Thee we live, by Thee we are victorious and happy. Supreme Holy God, hear our prayers; to Thee we stretch forth our arms.
Hear, Holy Supreme God.