Clark's Folly: Extravagance on Fifth Avenue

Clark, who was originally born in Pennsylvania, moved out west with his family to study law, then eventually found his way to financial success in the Montana Gold Rush of the early 1860s. It was through copper that Clark truly made his fortune, though, and became known as one of the three “Copper Kings” of Butte Montana, along with Marcus Daly and F. Augustus Heinze. His 34-room mansion in Butte, Montana, still stands today as the “Copper King Bed and Breakfast.”

While now replaced by an apartment building, 960 Fifth Avenue used to be the lavish home of Montana Senator and copper magnate William S. Clark Sr.