Vellum is a printing material which was used as early as 2000 BC. It frequently appears in old, rare books as well as maps, deeds, and other important documents. It is valued for its distinct feel and assumed nobility. Gutenberg printed bibles with it; the Declaration of Independence is written on it; and the UK still prints its Acts of Parliament on vellum for archival purposes. Read on for a brief history of vellum and some insight into vellum preservation best practices.