In the North, Christianity was propagated by the sword of Otho, the conqueror and apostle of the Slavic nations of the Elbe and Oder: the marches of Brandenburgh and Sleswick were fortified with German colonies; and the king of Denmark, the dukes of Poland and Bohemia, confessed themselves his tributary vassals.

At the head of a victorious army, he passed the Alps, subdued the kingdom of Italy, delivered the pope, and forever fixed the Imperial crown in the name and nation of Germany.

From that memorable aera, two maxims of public jurisprudence were introduced by force and ratified by time.

I.That the prince, who was elected in the German diet, acquired, from that instant, the subject kingdoms of Italy and Rome.II.But that he might not legally assume the titles of emperor and Augustus, till he had received the crown from the hands of the Roman pontiff.

[119] [Footnote 117: He was the son of Otho, the son of Ludolph, in whose favor the Duchy of Saxony had been instituted, A.D.858.