Lev Kazimirovich Khrshchonovich (Russian: Лев Казими́рович Хрщоно́вич, 1838-1907), last name also spelled Chrśonowicz, Chrszczonowicz, Hrszczonowicz, Hrśonowicz, and Xrşçonoviç, was the chief architect of Kazan.
He was a son of Minsk architect Kazimierz Chrśonowicz, an ethnic Pole.
Khrshchonovich graduated from the Saint Petersburg Architect School in 1859 and was sent to Kazan.
Khrshchonovich designed the Lutheran Church (1870s), Alafuzov Theatre (1900), the first stone bridge over Bolaq (1907), and managed the reconstruction of the Rome-Catholic Church (1907).
He was married to Maria and had a son Leonid, who also became an engineer.