The February Revolution of 1917 was the first of two revolutions in Russia in 1917. It was centered on Petrograd (now St. Petersburg), then the Russian capital, on Women's Day in March (late February in the Julian calendar). The revolution was confined to the capital and its vicinity, and lasted less than a week. It involved mass demonstrations and armed clashes with police and gendarmes, the last loyal forces of the Russian monarchy. In the last days mutinous Russian Army forces sided with the revolutionaries. The immediate result of the revolution was the abdication of Tsar Nicholas II, the end of the Romanov dynasty, and the end of the Russian Empire. The Tsar was replaced by a Russian Provisional Government under Prince Georgy Lvov. The Provisional Government was an alliance between liberals and socialists who wanted political reform. They set up a democratically-elected executive and constituent assembly. At the same time, socialists also formed the Petrograd Soviet, which ruled alongside the Provisional Government, an arrangement termed Dual Power.