Its 140,000 manuscripts fragments, mainly in Hebrew and Arabic, shed light on the mundane as well as the religious and cultural activities of that world. The programme of conservation and research being conducted by the Genizah Research Unit at the University Library, where they are housed, is leading to all manner of exciting discoveries about Jewish religious, communal and personal life, Hebrew culture, settlement in the land of Israel and relations with Muslims and Christians from as early as the ninth and tenth centuries.