- "name the richest businessman from the time of Columbus/ Amerigo" The copper monopolist. His name is easy to remember, https://en.wikipedia.org/wiki/Jakob_F

- "name the richest businessman from the time of Columbus/ Amerigo" The copper monopolist. His name is easy to remember, https://en.wikipedia.org/wiki/Jakob_Fugger https://en.wikipedia.org/wiki/Jakob_Fugger (Some crossover: the bio says he was a major investor in some of those spice-route-seeking expeditions, possibly including Magellan's).