On this day: 20/01/250
Pope Fabian is martyred during the Decian persecution.
On this day: 20/01/649
King Chindasuinth, at the urging of bishop Braulio of Zaragoza, crowns his son Recceswinth as co-ruler of the Visigothic Kingdom.[citation needed]
On this day: 20/01/1156
Finnish peasant Lalli kills English clergyman Henry, the Bishop of Turku, on the ice of Lake Köyliö.
On this day: 20/01/1265
The first English parliament to include not only Lords but also representatives of the major towns holds its first meeting in the Palace of Westminster, now commonly known as the "Houses of Parliament".
On this day: 20/01/1320
Duke Wladyslaw Lokietek becomes king of Poland.
On this day: 20/01/1356
Edward Balliol surrenders his claim to the Scottish throne to Edward III in exchange for an English pension.
On this day: 20/01/1523
Christian II is forced to abdicate as King of Denmark and Norway.
On this day: 20/01/1567
Battle of Rio de Janeiro: Portuguese forces under the command of Estácio de Sá definitively drive the French out of Rio de Janeiro.
On this day: 20/01/1576
The Mexican city of León is founded by order of the viceroy Don Martín Enríquez de Almanza.
On this day: 20/01/1649
The High Court of Justice for the trial of Charles I begins its proceedings.