The Quadruple Alliance is a treaty signed in Paris on 20 November, 1815 by the United Kingdom, Austria, Prussia, and Russia.
It renews the alliance first agreed to in 1813 and it modifies the aims of the alliance from defeating Napoleon Bonaparte to upholding the settlement following the Napoleonic Wars: with France's admission in 1818, it becomes the Quintuple Alliance, though British government distaste for the other allies' reactionary policies meant that it lapses into ineffectiveness after the mid-1820s.
