 Two of the main sets of laws issued in the 16th century regulated Spanish interaction with the Native peoples, an issue about which the Crown quickly became concerned soon after the voyages of Christopher Columbus and his governorship.The Laws of Burgos (1512), signed by King Ferdinand II of Aragon, focused upon the welfare of the conquered native peoples.The issue was revisited after Bartolomé de las Casas brought attention to abuses being carried out by encomenderos.