AT the opening of the nineteenth century the Holy Roman Empire of the German Nation still existed, after a thousand years of chequered life. Long decadent, it was now moribund, however, and perpetuated only in name an august sovereignty which at one time extended over a large part of the European Continent. Diverse in race, language, religion, and political forms, having no common bond in administration, law, justice, or military organization, the many parts of the imperial dominion were kept together in firm union only so long as they were subject to a strong rule, and when once the centre of authority had become weakened, decline and disintegration ran their certain course. More and more the northern kingdom had disputed the superiority claimed, in virtue of a sovereignty that had become little more than titular, by its older but less vigorous rival on the Danube. From the time when Frederick the Great established the Prussian military State, whose foundations had been laid by his father, and challenged the power of the house of Habsburg in its citadel by the rape of Silesia, an act of aggression which he had to defend by seven years of continuous warfare, the precedence of Austria in the Empire had been definitely threatened...