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 had earlier been called race music, and country music. See also rock musical and rock opera. 20th-century music During the 20th century there was a huge increase in the variety of music that people had access to. Prior to the invention of mass market gramophone records (developed in 1892) and radio broadcasting (first commercially done ca. 1919–20), people mainly listened to music at live Classical music concerts or musical theatre shows, which were too expensive for many lower-income people; on early phonograph players (a technology invented in 1877 which was not mass-marketed until the mid-1890s); or by individuals performing music