Henry is forced to perform his coronation…

Henry is forced to perform his coronation on June 29, 1312 at the Lateran, as the Colonna family has possession of the area around the Basilica of St. John Lateran, Santa Maria Maggiore and the Colosseum.

The ceremony is performed by three Ghibelline cardinals who had joined Henry on his way through Italy.

Robert of Naples, in the meantime, has made increasing demands upon Henry, including Henry making Robert’s son the Imperial vicar of Tuscany, and that Henry has to depart Rome within four days of his coronation.

Henry, in his turn, declares that the imperial prerogative overrides papal authority, and that the entirety of Italy is subject to the emperor.

He then refuses to commit, as Pope Clement V has requested, to seek a truce with Robert of Naples, and he doesn’t rule out attacking the southern kingdom.

Henry concludes a formal treaty, signed with Robert's rival to the Sicilian throne, Frederick of Aragon, but the chaos in the city of Rome soon forces Henry to leave: following the advice of Tuscan Ghibellines, he travels north to Arezzo.