The 176th anniversary of the Decemberists' uprising is to be commemorated in St.Petersburg on Friday. Decemberists were Russian aristocrat revolutionaries who led the first uprising in Russian history aimed at ousting the monarchy and abolition of serfdom. The anniversary of the uprising has been celebrated in St.Petersburg since 1987. Offspring of 20 Decemberist families currently live in the city. Many of them will rally on the Senate Square around 5 PM. The rebelling regiments were led to the square and formed up at this hour 176 years ago. Their offspring will lay a square made of red picks and lit candles to commemorate the heros of 1825. Flowers will also be laid to a memorial stele on the Peter-and-Paul fortress crownwork, where five Decemberists: Pavel Pestel, Sergey Muravyov-Apostol, Kondraty Ryleyev, Mikhail Bestuzhev-Ryumin, and Pyotr Kakhovsky were executed. Flowers will also be laid to the obelisk on the Decemberists' Isle, where they are believed to have been buried. A temporal exhibition named "Decemberists. Their Faces" opens in the All-Russian Pushkin Museum on the same day with exhibits provided by major Russian archives, museums, and libraries. In addition, a scientific anthology published on the basis of documents presented from the conference "Sources and Fate of Liberalism in Russia" held a year ago, will be presented in St.Petersburg.