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Skip to main contentHistorical FiguresWinston ChurchillAbraham LincolnThomas JeffersonGeorge WashingtonAndrew JacksonNapoleon BonaparteWalt WhitmanRobert E. LeeAlbert EinsteinJohn HancockHistorical EventsRevolutionary WarThe 19th CenturyAmerican Civil WarWorld War IIThe 20th CenturyRecent AquisitionsNew AcquisitionsThe Raab CollectionAbout UsBlogCorporateContactLoginPopular Subjects ▲Call Us 800.977.8333Main menuBuyingSellingGiftingLearningSearch formSearchSign Up For NewsSign up for our email listEnter your email address below to learn about new historical documents and other information, including Nathan's blog on Forbes.Email AddressXAllbrowse all Figures PresidentsAmerican HistoryWorld HistoryMilitary LeadersArts & Sciences Eras/Events Revolution, RepublicCivil WarWorld War IIThe 20th CenturyThe 19th Century Collector's Library Learn About Collecting Historical DocumentsAuthenticating autographsCertificates of AuthenticityKnow the Identified ForgersSome Useful Advice in AuthenticityDo Autographs Increase in Value?History of Autograph CollectingIn AmericaRenaissance to the Modern AgeThe Ancient World Through the Middle AgesIntroductory Tips For the New CollectorNotable FiguresGeorge Washington AutographsZachary Taylor AutographsTypes of Historical Autographs and Terminology What Makes Autographs Valuable?Misrepresented Quality and RaritySigned Photographs and BooksThe Impact of Condition Lectures & Events The Raab Collection is available for lectures, symposia, or a private gathering. We also coordinate unique social events and other programming. Learn More In The Presence of History In the Presence of History is a large format, full color book with important advice, interesting facts and stories, and beautiful illustrations for those fascinated by historical autographs. It provides the tools people need to begin authenticating autographs for themselves, and also contains a thorough color study of the letters and documents of U.S. Presidents, with hundreds of color illustrations. Available now at Amazon Or buy from us directly The Raab Blog This Washington Document Now on Display at Mount Vernon RAAB IN FORBES Washington Document Heading On Loan to Mount Vernon BuyingWorld HistoryAlbert EinsteinEinstein Confirms the Most Important Scientific Principle of the 20th Century, In a... Einstein Confirms the Most Important Scientific Principle of the 20th Century, In a Newly Discovered Letter "Space should be looked at as a four-dimensional continuum" He is concerned with the geometry of curved space, and discusses the mathematics behind his work in a letter sent to a soldier fighting in World War II; He sheds light on his approach to scientific inquiry in his quest for a Unified Theory In 1905, while a young patent clerk and physicist in Bern, Switzerland, Albert Einstein obtained his doctorate and published a paper that explained his newly developed Special Theory of Relativity. This unlocked many mysteries of the univers
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