A letter of introduction, written and signed by the Rambam (Maimonides) in the 12th century, which is part of the Discarded History exhibition that will be opening in April 2017 at Cambridge University. Visitors will be able to see a small fraction of the more than 300,000 manuscripts and fragments that were originally found in the geniza, or storeroom, of Ben Ezra Synagogue in Fustat, or Old Cairo, in Egypt. Some of the items are more than 1,000 years old and, among them, are accounting records and parts of responsa and observations by some of the greatest Jewish theological minds, such as the Rambam, Isaac Luria and Joseph Caro. (photo by Edgar Asher with permission of the Syndics of Cambridge University Library)