A king and queen of Spain in the late fifteenth and early sixteenth centuries. They united their country and sponsored the exploration of the New World by Christopher Columbus. if (window.googletag) {googletag.cmd.push(function() { googletag.display('dcomMobileSERPDisplayTopAd-300x250'); });} else {console.error('googletag not defined, dcomMobileSERPDisplayTopAd-300x250');}