The Vilna Ghetto was called "Yerushalayim of the Ghettos" because it was known for its intellectual and cultural spirit. Before the war, Vilnius had been known as "Yerushalayim d'Lita" (Yiddish: Jerusalem of Lithuania) for the same reason. The center of cultural life in the ghetto was the Mefitze Haskole Library, which was called the "House of Culture". It contained a library of 45,000 volumes, reading hall, archive, statistical bureau, room for scientific work, museum, book kiosk, post office, and sports ground. Groups, such as the Literary and Artistic Union and the Brit Ivrit Union, organized events commemorating Yiddish and Hebrew authors and put on plays in these languages. The popular Yiddish magazine "Folksgezunt" was continued in the ghetto and its essays were presented in public lectures. Yitskhok Rudashevski (1927–1943), a young teen who wrote a diary of his life in the ghetto during 1941 to 1943, mentions a number of these events and his participation in them. He was murdered in the liquidation of 1943, probably at Paneriai. His diary was discovered in 1944 by his cousin.