That work relates the story of this man's surprise coronation by Pope Leo III on Christmas Day.
This ruler created a position for pairs of officials, one ecclesiastical and one secular, to travel to parts of his domain out of his reach, called the missi dominici. He planned military campaigns during an annual meeting of nobles called the Marchfield. Among the figures in his employ was the author of the Historia Langobardium, Paul the Deacon, and a figure who introduced the liberal arts into the education system and created this ruler's namesake minuscule script, a man named Alcuin of York. One story relates how this ruler's greatest failure was his inability to write, which he attempted to learn in old age. The author off On the Adoration of the Cross used Suetonius' Lives of the Twelve Caesars as a model in writing a biography of this figure. That work relates the story of this man's surprise coronation by Pope Leo III on Christmas Day. For 10 points, identify this figure, a flattering biography of whom was written by Einhard.
This ruler created a position for pairs of officials, one ecclesiastical and one secular, to travel to parts of his domain out of his reach, called the missi dominici.
Charlemagne or Carolus Magnus or Charles the Great