Constitutio Romana

The Constitutio Romana was a ninth century agreement between King Lothair I of Italy and Pope Eugene II, confirmed on 11 November 824, setting out in nine articles the relationship between imperial and papal authority in central Italy. In it Eugene II accepted concessions to imperial power in return for Lothair's military and legal backing, and the document introduced what is described as the earliest known papal oath, sworn by a pope elect to an imperial representative before consecration, while restoring a role for both laity and clergy in papal elections. Scholars disagree over whether the Constitutio was chiefly a symbolic agreement with little practical effect or a genuine step toward imperial control of the papacy. Pope Marinus I revoked it roughly sixty years later, though similar provisions reappeared in the Diploma Ottonianum in 962. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/