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Secondary sourceBook1902

Toscanelli and Columbus: The Letter and Chart of 1474

Henry Vignaud · 1902

A 1902 scholarly study examining the letter and chart that Columbus is thought to have used when planning his westward voyage.

This scholarly study examines a document Columbus is believed to have used to plan his westward voyage.

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Toscanelli and Columbus: The Letter and Chart of 1474PDF · 406 pages
Henry Vignaud, Toscanelli and Columbus: The Letter and Chart of Toscanelli, 1902.

About this source

What it is

This is a book by Henry Vignaud, published in 1902, studying a letter and chart said to have been sent by Paolo del Pozzo Toscanelli to the Portuguese Fernam Martins in 1474, and later passed to Christopher Columbus. It is held as a scanned book on the Internet Archive.

Why it matters

Columbus is thought to have used Toscanelli's letter and chart to support his belief that a westward sea route to Asia was possible. This book critically examines the authenticity and value of those documents, and traces the sources of Columbus's ideas about geography. It shows how historians test old claims rather than simply accepting them.

Look closer

  • Why would a scholar in 1902 want to question documents from over 400 years earlier?
  • What difference would it make if the Toscanelli letter was not genuine?
  • How might Columbus's planning have been different without this letter?

This book is part of the curated material that grounds the AI version of Christopher Columbus on Humy.ai — when students ask about related events, the AI can quote it and cite it.

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