The archival collection contains over 100,000 books, manuscripts, documents, and maps ranging from 1494 to the present. Items of special interest are:

• A letter dictated and signed by Diego Columbus in 1512
• The Cortez Decree of 1521
• Copies of the Declaration of Independence and the Articles of Confederation, signed by Benjamin Franklin
• Thomas Jefferson letter dated July 1, 1776
• Codex Canadiensis, Louis Nicolas, between 1675 and 1680

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