1) City 2) City renamed for Lenin 3) Leningrad 4) Metropolis 5) Peterburg 6) Russian Revolution locale 7) Saint petersburg 8) Urban center Found on https://www.crosswordclues.com/clue/petrograd
Former name (1914–24) of St Petersburg, a city in Russia. It adopted this Russian-style name as a patriotic gesture at the outbreak of World War I, but was renamed Leningrad on the death of the USSR's first leader Found on https://www.encyclo.co.uk/local/21221