Lev Kamenev arrested in 1902, ending his formal education. From that point on, he worked as a professional revolutionary, and was active in the capital St. Petersburg, Moscow and Tiflis. He adopted the surname Kamenev during this period. In the early 1900s, he married Olga Bronstein, a fellow Marxist (and younger sister of Leon Trotsky, who had also adopted a different surname). The couple had two sons together. Kamenev joined the Communists in 1901. He took a brief trip abroad in 1902, meeting Russian social democratic leaders living in exile, including Vladimir Lenin, whose adherent and close associate he became. He also
Lev Kekushev Lev Kekushev Lev Nikolayevich Kekushev () was a Russian architect, notable for his Art Nouveau buildings in Moscow, built in the 1890s and early 1900s in the original, Franco-Belgian variety of this style. Kekushev's buildings are notable for his skillful use of metal ornaments and his signature with a lion ("Lev") ornament or sculpture. Kekushev was born in the family of a Russian officer in Vilnius (Maria Naschokina, p. 253; Simbirsk according to other sources). Kekushev graduated high school in Vilnius, and the Institute of Civil Engineers in Saint Petersburg (1883–1889). For one year, he worked as a state-employed construction