Britain's Longest- and Shortest-Reigning Royals - WSJ
Leopold I of Belgium - Wikipedia
Leopold I of Belgium - Wikipedia
Shortest Reigning Monarchs In History - YouTube
Who was the shortest reigning monarch in world history? - Quora
Europe's five longest-reigning monarchs : r/europe
Which British monarch had the shortest reign? - Quora
The "king" with the shortest "reign" 15 minutes, colorized from a vintage portrait of Don Luís Felipe, Prince Royal of Portugal (1887 -1908) ca 1906 [2200-1600] : r/HistoryPorn
List of current reigning monarchs by length of reign - Wikiwand
Monarchy of Belgium - Simple English Wikipedia, the free encyclopedia
Shortest Reigning Monarchs in History - YouTube
List of Belgian monarchs - Wikipedia
The 12 Longest Reigning Monarchs in History — History is Now Magazine, Podcasts, Blog and Books | Modern International and American history
List of Belgian monarchs - Wikipedia
The shortest reigns in English royal history – Royal Central
Britain's Longest- and Shortest-Reigning Royals - WSJ
Op hogescholen is minder ruimte voor zonnekoningen' - Vox magazine
Britain's Longest- and Shortest-Reigning Royals - WSJ
List of shortest-reigning monarchs - Wikiwand
Who was the last monarch in European history to fight personally in battle alongside their men? - Quora