The Trienio Liberal was a period of 3 years from 1820 to 1823 during which a liberal government ruled Spain. This period began after a military uprising ousted King Ferdinand VII in 1820, and ended in 1823 when French King Louis XVIII ordered the army to intervene and help reinstate Ferdinand's absolute power.
- Assassin's Creed (film) (mentioned in promotional material only)
- FamilyTreeDNA (28 October, 2016). Assassin's Creed DNA – The Inside Story: Explore Historical Timeline. Family Tree DNA. Archived from the original on October 30, 2016. Retrieved on November 8, 2016.