- 366 - The Alamanni crossed the frozen Rhine in large numbers to invade the Roman Empire.
- 533 - Mercurius became Pope John II, the first pope to adopt a new name upon elevation to the papacy.
- 1492 - Reconquista: Los Reyes Católicos expelled Boabdil of Granada (pictured), the last of the Moorish rulers, from the Iberian Peninsula.
- 1946 - Unable to resume his reign after World War II, King Zog of Albania abdicated but retained his claim to the throne.
- 1949 - Luis Muñoz Marín became the first democratically elected Governor of Puerto Rico.
Recent days: January 1 - December 31 - December 30
- 366 - The Alamanni crossed the frozen Rhine in large numbers to invade the Roman Empire.
- 533 - Mercurius became Pope John II, the first pope to adopt a new name upon elevation to the papacy.
- 1492 - Reconquista: Los Reyes Católicos expelled Boabdil of Granada (pictured), the last of the Moorish rulers, from the Iberian Peninsula.
- 1946 - Unable to resume his reign after World War II, King Zog of Albania abdicated but retained his claim to the throne.
- 1949 - Luis Muñoz Marín became the first democratically elected Governor of Puerto Rico.
Recent days: January 1 - December 31 - December 30