The Early Americas at Library of Congress

Useful for those doing courses in American or Precolumbian art, the Library of Congress's Exploring the Early Americas

"features selections from the more than 3,000 rare maps, documents, paintings, prints, and artifacts that make up the Jay I. Kislak Collection at the Library of Congress. It provides insight into indigenous cultures, the drama of the encounters between Native Americans and European explorers and settlers, and the pivotal changes caused by the meeting of the American and European worlds. The exhibition includes two extraordinary maps by Martin Waldseemüller created in 1507 and 1516, which depict a world enlarged by the presence of the Western Hemisphere."

If you follow the links to the Exhibition Themes, there are images of numerous objects with copious information. There are also interactive presentations.

It's not clear from the website how long this exhibition will be up at the Library, but the online content should be up indefinitely.