YIVO's collections of 23 million archival pieces & 360,000 books related to Eastern European Jewry. Unique Judaica on display. 15 W. 16th St. Mon. to Thurs, 9 a.m. - 5:30 p.m.; Fri. 9 a.m. - 2 p.m.; Sun., 11 a.m. - 5 p.m. Free. 212 246 6080.