sentences:  Krzhizhanovsky was born in Samara in 1872.In 1889 he moved to St Petersburg, where he attended the Saint Petersburg State Institute of Technology, becoming involved in Marxist circles in 1891.He was a close friend and colleague of Lenin and, in 1895, was one of the co-founders, with Lenin, of the St. Petersburg League of Struggle for the Emancipation of the Working Class.