Template:On this day/20 October
- 1548 – The ceety of Nuestra Señora de La Paz (Oor Lady o Peace) is foondit bi Alonso de Mendoza bi appyntment o the keeng o Spain an Haly Roman Emperor, Charles V.
- 1740 – Maria Theresa (picturt) taks the throne o Austrick.
- 1818 – The Convention o 1818 is signed atween the Unitit States an the Unitit Kinrick, that settles the Canadae–Unitit States mairch on the 49t parallel for maist o its lenth.
- 1977 – Rock baund Lynyrd Skynyrd's plane crashes. Lead sangster Ronnie Van Zant an guitarist Steve Gaines perish in the crash.
- 2011 – Libie Ceevil War: Naitional Transeetional Cooncil rebel forces captur oustit Libie dictator Muammar Gaddafi in his hametoun o Sirte an kill him shortly thareefter.
John Dewey (b. 1859) · Snoop Dogg (b. 1971) · Muammar Gaddafi (d. 2011)