Ingenpedia:OnThisDay/December 20


 * AD 69 – Priscus enters Rome to claim the title of Emperor for Nero's former general Vespasian.[1]
 * 1192 – Richard I of England is captured and imprisoned by Leopold V of Austria on his way home to England after the Third Crusade.[2]
 * 1334 – Cistercian Jacques Fournier is elected Pope Benedict XII.[3]
 * 1803 – The Louisiana Purchase is completed at a ceremony in New Orleans.
 * 1808 – Peninsular War: The Siege of Zaragoza begins.
 * 1808 – The original Garden Theatre in London is destroyed by a fire, along with most of the scenery, costumes and scripts.
 * 1832 – HMS Clio under the command of Captain Onslow arrives at Port Egmont under orders to take possession of the Falkland Islands
 * 1860 – South Carolina becomes the first state to attempt to secede from the United States.