<a href="https://en.wikipedia.org/wiki/Grigory_Zinoviev" class="extiw" title="en:Grigory Zinoviev">Grigory Zinoviev</a>, Chairman of <a href="https://en.wikipedia.org/wiki/Petrograd_Soviet" class="extiw" title="en:Petrograd Soviet">The Petrograd Soviet</a> addresses the crowd on the <a href="https://en.wikipedia.org/wiki/International_Workers%27_Day" class="extiw" title="en:International Workers' Day">first International Workers' Day</a> after the <a href="https://en.wikipedia.org/wiki/October_Revolution" class="extiw" title="en:October Revolution">October Uprising (the Bolshevik Revolution)</a>. Date:  May 1 1918. Place: <a href="https://en.wikipedia.org/wiki/Field_of_Mars_(Saint_Petersburg)" class="extiw" title="en:Field of Mars (Saint Petersburg)">Fields of Mars, Petrograd</a>. 
Context: Zinoviev was one of the seven leaders of <a href="https://en.wikipedia.org/wiki/Politburo_of_the_Communist_Party_of_the_Soviet_Union" class="extiw" title="en:Politburo of the Communist Party of the Soviet Union">the first Politburo</a>, founded in 1917 in order to manage the Uprising in 1917: <a href="https://en.wikipedia.org/wiki/Vladimir_Lenin" class="extiw" title="en:Vladimir Lenin">Lenin</a>, <a href="https://en.wikipedia.org/wiki/Leon_Trotsky" class="extiw" title="en:Leon Trotsky">Trotsky</a>, <a href="https://en.wikipedia.org/wiki/Grigory_Zinoviev" class="extiw" title="en:Grigory Zinoviev">Zinoviev</a>, <a href="https://en.wikipedia.org/wiki/Lev_Kamenev" class="extiw" title="en:Lev Kamenev">Kamenev</a>, <a href="https://en.wikipedia.org/wiki/Joseph_Stalin" class="extiw" title="en:Joseph Stalin">Stalin</a>, <a href="https://en.wikipedia.org/wiki/Grigori_Sokolnikov" class="extiw" title="en:Grigori Sokolnikov">Sokolnikov</a>, and <a href="https://en.wikipedia.org/wiki/Andrei_Bubnov" class="extiw" title="en:Andrei Bubnov">Bubnov</a>. He became the Chairman of the Executive Committee of <a href="https://en.wikipedia.org/wiki/Communist_International" class="extiw" title="en:Communist International">the Comintern</a> when it was created in March 1919 to spread the uprising worldwide. Grigory Zinoviev was executed in 1936, following the court case known as <a href="https://en.wikipedia.org/wiki/Moscow_Trials" class="extiw" title="en:Moscow Trials">Trial of Sixteen</a>. This trial started the historical period known as <a href="https://en.wikipedia.org/wiki/Great_Purge" class="extiw" title="en:Great Purge">The Great Purge</a>.
Yakov Steinberg b. 1880 d. 1942
1918-05-12
Plamia issue 2, May 12 1918. Magazine published by as <a href="https://en.wikipedia.org/wiki/Anatoly_Lunacharsky" class="extiw" title="en:Anatoly Lunacharsky">Anatoly Lunacharsky</a>. The image taken from <a rel="nofollow" class="external text" href="https://www.flickr.com/people/124344537@N02">The Kathryn and Shelby Cullom Davis Library</a>