Grover Cleveland

The Library of Congress recently completed a major digitization effort, making collections of 23 U.S. presidents' papers available online for study. From left: Calvin Coolidge, Abraham Lincoln, George Washington, Benjamin Harrison and Thomas Jefferson; behind: Jefferson's June 1776 draft of the Declaration of Independence

Library of Congress' Presidential Papers, From Washington's Geometry Notes to Wilson's Love Letters, Are Now Online

Four newly added collections mark the conclusion of a two-decade digitization project

Can Space End, Where Did Time Zones Come From and More Questions from our Readers

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