ʻIolani Palace, in the capitol district of downtown Honolulu in the U.S. state of Hawaiʻi, is the only royal palace in the United States used as an official residence by a reigning monarch and is a National Historic Landmark listed on the National Register of Historic Places. Two monarchs governed from ʻIolani Palace: King Kalākaua and Queen Liliʻuokalani. After the monarchy...