Holy Alliance A compact formed between the sovereigns of Russia, Austria, and Prussia, in 1815, for the humane and liberal administration of their governments. See Herzog, Real-Encyklopadie, 5, 669; Wing's Hase, Ch. Hist. (see Index); Hurst's Hagenbach, Hist. Christ. Church in 18th and 19th Cent. 2, 342 sq.; and the references in Poole's Index, s.v. SEE ALLIANCE, HOLY.