December 25, is the date recognized by the Roman Catholic Church for the birth of Jesus Christ. 336 AD the first recorded celebration of Christmas on Dec. 25th took place in Rome. 795 Pope Adrian I died. The relationship of Adrian to Charlemagne was considered an ideal expression of Church and State in a united Christian society.
800 Charlemagne, King of the Franks, was crowned the first Holy Roman Emperor by Pope Leo III in Rome. 875 Charles the Bald was crowned Holy Roman Emperor.
1000 Hungary was established as a Christian kingdom by Stephen I of Hungary. 1066 William the Conqueror was crowned king of England, at Westminster Abbey, London. 1100Baldwin of Boulogne was crowned the first King of Jerusalem in the Church of the Nativity. 1130 Count Roger II of Sicily was crowned the first King of Sicily. 1156Peter the Venerable died. As Abbot of Cluny, Peter of Montboissier made great reforms to the monastery that restored its influence in European religious politics.
1223 St. Francis of Assisi assembled the first Nativity scene. 1261 John IV Lascaris of the restored Eastern Roman Empire was deposed and blinded by orders of his co-ruler Michael VIII Palaeologus. 1559 Pius IV was elected pope. Born Giovanni Angelo de'Medici, Pius concluded the Council of Trent and pursued reforms of the Papal Curia.