Saint Petersburg significant event Siege of Leningrad
During the 20th century, the city experienced dramatic population changes. From 2.4 million residents in 1916, its population dropped to less than 740,000 by 1920 during the Russian Revolution of 1917 and Russian Civil War. The minorities of Germans, Poles, Finns, Estonians and Latvians were almost completely transferred from Leningrad during the 1930s. From 1941 to the end of 1943, population dropped from 3 million to less than 600,000, as people died in battles, starved to death or were evacuated during the Siege of Leningrad. Some evacuees returned after the siege, but most influx was due to migration from other parts of the Soviet Union. The city absorbed about 3 million people in the 1950s and grew to over 5 million in the 1980s. From 1991 to 2006 the city's population decreased to 4.6 million, while the suburban population increased due to privatization of land and massive move to suburbs. Based on the 2010 census results the population is over 4.8 million. For the first half of 2007, the birth rate was 9.1 per 1000 and remained lower than the death rate (until 2012); people over 65 constitute more than twenty percent of the population; and the median age is about 40 years. Since 2012 the birth rate became higher than the death rate. But in 2020 the COVID-19 pandemic caused a drop in birth rate, and the city population decreased to  5,395,000 people.Dmitri Shostakovich, who was born and raised in Saint Petersburg, dedicated his Seventh Symphony to the city, calling it the "Leningrad Symphony". He wrote the symphony while based in the city during the siege of Leningrad. It was premiered in Samara in March 1942; a few months later, it received its first performance in the besieged Leningrad at the Bolshoy Philharmonic Hall under the baton of conductor Karl Eliasberg. It was heard over the radio and was said to have lifted the spirits of the surviving population. In 1992, the 7th Symphony was performed by the 14 surviving orchestral players of the Leningrad premiere in the same hall as half a century before. The Leningrad Philharmonic Orchestra remained one of the best known symphony orchestras in the world under the leadership of conductors Yevgeny Mravinsky and Yuri Temirkanov. Mravinsky's term as artistic director of the Leningrad Philharmonic—a term that is possibly the longest of any conductor with any orchestra in modern times—led the orchestra from a little-known provincial ensemble to one of the world's most highly regarded orchestras, especially for the performance of Russian music.
The Imperial Choral Capella was founded and modelled after the royal courts of other European capitals.