This office's holders were given a crown that supposedly contained a nail from the True Cross, the Iron Crown of Lombardy.
A writer imagined that a holder of this office would restore order to the world as "Alto Arrigo." The body of a holder of this office was preserved in vinegar so that it could be interred in Jerusalem, but was buried in Antioch. A religiously tolerant holder of this office who spoke six languages, including Arabic and Greek, was called "stupor mundi" by contemporaries; he and his grandfather of the same name were believed to (*) sleep beneath the Kyffhauser mountains. This office's holders were given a crown that supposedly contained a nail from the True Cross, the Iron Crown of Lombardy. Dante placed an eccentric Sicilian man with this title in the Sixth Circle, even though as a Guelph he backed this office's holder against the Pope. For 10 points, name this elected position held by Frederick Barbarossa.
A writer imagined that a holder of this office would restore order to the world as "Alto Arrigo.
Holy Roman Emperor [or Romanorum Imperator; prompt on emperor or Kaiser or King of Germany; do not accept or prompt on “Roman emperor”] &lt;AF, ContHist&gt;