State Museum of the History of St. Petersburg exhibitions began in 1957, celebrating the 250th anniversary of Leningrad. The museum contained over 1 million objects in 2002, including the collection of architects documents, photos and plans of Saint Petersburg of the 18th–20th centuries. State Museum of the History of St. Petersburg The State Museum of the History of St. Petersburg (), formerly the Museum of Leningrad History from 1955 to 1991, is a museum of the city history in Saint Petersburg, Russia. The headquarters of the museum are located in the Peter and Paul Fortress. It was established in 1938 as the Museum of History and Development of
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