 After returning to Lithuania, Sleževičius took part in establishing a cultural society of the same name in Vilnius, acting as its secretary.The society was active between 1908 and 1918 and operated a library, organized lectures and concerts, and staged over 50 plays.Sleževičius directed several of the them, with his staging of Juliusz Słowacki's "Mindaugas" (1908) and Vincas Nagornockis' "Živilė" (1909) particularly well received.