Answer;
1. Plague of Justinian - 541–549 AD
Named after the Roman Justinian, this plague was said to have killed between 25 and a 100 million people.
2. Charlemagne crowned Holy Roman Emperor - December 25, 800 AD
Pope Leo III crowned Charlemagne as Holy Roman Emperor on this day to recognize his power and affirm his relationship with the church.
3. Magna Carta - 15 June 1215
King John of England accepted the Magna Carta Libertatum on this date thus paving the way for the monarchy to become a Constitutional one.
4. Avignon Papacy - 1309 to 1376
Between 1309 and 1376, Popes stayed in Avignon in France instead of in Rome.
5. Vasco da Gama Reaches India - May 20, 1498
Vasco de Gama reached Calicut in Kerala on this day and in so doing became the first European to reach India by sea.
6. Martin Luther posts his Ninety-Five Theses - On October 31, 1517
7. Reign of Charles V - 1519 – 1558
Charles V reigned as Holy Roman Emperor from 1519 until his death in 1558.
8. Cortes's Army Conquers Artec Empire -1521
Spanish conquistador Hernán Cortés conquered the Aztecs for Spain and seized their capital Tenochtitlan in 1521.
9. Ottomans Siege Vienna - 27 September–15 October 1529
The Ottoman emperor Suleiman the Magnificent attempted to capture Vienna in 1529 but had to withdraw when the winter set in.
10. The Council of Trent - 1545 and 1563
Set up as a result of the Protestant Reformation, the Council aimed to lead a Counter-Reformation.