Protocol of St. Petersburg Prince de Lieven arrived in St. Petersburg, serious talks began with Wellington. On 4 April 1826, the St. Petersburg Protocol, written in French, was signed by Prince de Lieven and Nesselrode for Russia and Wellington for Britain. The terms of the protocol were: The importance of the St. Petersburg protocol rested less with its precise terms, but as the beginning of the internationalization of the Greek war of independence as for the first time, two of the Great Powers had agreed to a plan to impose mediation on the war, granting the Greeks a limited independence and were willing to
20th-century music gestures and formlessness of late Romanticism which revived the balanced forms and clearly perceptible thematic processes of earlier styles. There were three distinct "schools" of neoclassicism, associated with Igor Stravinsky, Paul Hindemith, and Arnold Schoenberg. Similar sympathies in the second half of the century are generally subsumed under the heading "postmodernism". A compositional tradition arose in the mid-20th century—particularly in North America—called "experimental music". Its most famous and influential exponent was John Cage (1912–1992). According to Cage, "an experimental action is one the outcome of which is not foreseen", and he was specifically interested in completed works that performed an