Petrograd

Former name for the city of St Petersburg.

On September 1, 1914, after the outbreak of World War I, the Russian Imperial government renamed the city Petrograd, meaning "Peter's City", to remove the German words Sankt and Burg.
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The Bolsheviks in Power: The First Year of Soviet Rule in Petrograd
Lost Roses (Woolsey-Ferriday, #2)
Eye of the Red Tsar (Inspector Pekkala, #1)