who was the shortest reigning monarch of england
List of British monarchy records The shortest-reigning monarch was Lady Jane Grey who ruled for 9 days from 6 July until 15 July 1553 (although she was only proclaimed queen by the Lords of the Council on 10 July). Note: Jane's reign is disputed.
List of Presidents of the United States by time in office William Henry Harrison spent the shortest time in office, and Franklin D. Roosevelt spent the longest. He is the only president to have served more than two terms. Presidents since Dwight D. Eisenhower have been constitutionally limited to two terms under the 22nd Amendment.