I just started reading Eduardo Galeano's Open Veins of Latin America and he seems to suggest Europeans had evidence of a civilization not known to them pre Columbus. Did corpses and art work really float from the America's to europe/ its territories or were these just folk-tales?
There is always more to say, but this question came up here a few months ago and got some fairly detailed responses from u/terminus-trantor and me, u/mikedash. You might like to review those earlier answers while you wait for fresh responses to your query.
Did the Portuguese ever find artefacts from America washed ashore prior to 1492?