彼得格勒苏维埃
The immediate effect of the February Revolution was a widespread atmosphere of elation and excitement in Petrograd. On , a provisional government was announced. The center-left was well represented, and the government was initially chaired by a liberal aristocrat, Prince Georgy Yevgenievich Lvov, a member of the Constitutional Democratic Party (KD). The socialists had formed their rival body, the Petrograd Soviet (or workers' council) four days earlier. The Petrograd Soviet and the Provisional Government competed for power over Russia.