ヴィテプスク県
Leon Petrażycki (Polish: Leon Petrażycki; Russian: "Лев Иосифович Петражицкий" [Lev Iosifovich Petrazhitsky]; born 13 April 1867, in Kołłątajewo, Vitebsk Governorate, now in Belarus – 15 May 1931, in Warsaw) was a Polish philosopher, legal scholar, and sociologist. He is considered an important forerunner of the sociology of law.