The crossword solution for the term 'King of Italy, 1805-1814' is 'NAPOLEONI'. This refers to Napoleon I, who was the King of Italy from 1805 to 1814. He was a French military and political leader who rose to prominence during the French Revolution and led several successful campaigns during the Revolutionary Wars. He was crowned Emperor of the French in 1804 and ruled until 1814. During his reign, he also served as the King of Italy from 1805 to 1814.