Many a book has been written about the Medici; yet how little has been said about the private lives of the founders of that wonderful family which rose from prosperous middle-class condition to take its place among the sovereign houses of Europe, to seat its daughters on the throne of the Queen-consorts of France, and its sons on the Chair of St. Peter? Their rival capitalists north of the Alps climbed high in those days when the gulf was dug deep between nobles and all who were below them in the social scale.