Concino Concini (kōnchē´nō kōnchē´nē), d. 1617, Florentine adventurer, favorite of Marie de' Medici, queen of France, who exerted great influence after the assassination of Marie's husband, Henry IV in 1610, and succeeded the duke of Sully as minister. His greed and his spy system won him the hatred of all classes. His efforts to weaken the nobility provoked an unsuccessful revolt (1615) led by Henri II de Condé (see under Condé, family). In 1617, Louis XIII had Concini assassinated. His wife, Leonora Galigaï (1571?–1617), lady in waiting and favorite of the queen, was beheaded and burned for sorcery.