Walter Alison Phillips, 1911 Encyclopædia Britannica, Volume 13… (1911)
“ As a diplomatic instrument the Holy Alliance never, as a matter of fact, became effective. None the less, its principles and the fact of its signature powerfully affected the course of European diplomacy during the 19th century. It strongly influenced the emperor Nicholas I. of Russia, to whom the brotherhood of sovereigns by divine right was an article of faith, inspiring the principles of the convention of Berlin (between Russia, Austria and Prussia) in 1833, and the tsar’s intervention in 1849 to crush the Hungarian insurrection on behalf of his brother of Austria. ”
