1068 – He was born this year in Selby, Yorkshire in the north east of England. He was the fourth son of William the Conqueror and the first born in England after the Norman Conquest of 1066.
1100 – He succeeded his elder brother William II as King of England. He reign on the 3rd day of August of this year, and was crowned on the 5th day of August of the same year. In the same year, he married Edith, daughter of King Malcolm III of Scotland. Since Edith was also the niece of Edgar Atheling and the great-granddaughter of Edward the Confessor’s paternal half-brother Edmund Ironside, the marriage united the Norman line with the old English line of Kings.
1101 – Robert Curthose attempted to seize the crown by invading England. In the Treaty of Alton, Robert agreed to recognise his brother Henry as King of England and return peacefully to Normandy, upon receipt of an annual sum of 2000 marks, which Henry proceeded to pay.
1103 – Henry was involved in a dispute with Anselm, the Archbishop of Canterbury and Pope Paschal II in the investiture controversy which was settled in the Concordat of London in 1107.
1105 – To eliminate the continuing threat from Robert Curthose and the drain on his fiscal resources from the annual payment, Henry led an expeditionary force across the English Channel.
1106 – He defeated his eldest brother, Robert Curthose, to become Duke of Normandy in this year.
1121 – He married Adeliza, daughter of Godfrey I of Leuven, Duke of Lower Lotharingia and Landgrave of Brabant, but there were no children from this marriage. Left without male heirs, Henry took the unprecedented step of making his barons swear to accept his daughter Empress Matilda, widow of Henry V, the Holy Roman Emperor, as his heir.
1135 – He visited Normandy in this year to see his young grandsons, the children of Matilda and Geoffrey. He took great delight in his grandchildren, but soon quarrelled with his daughter and son-in-law and these disputes led him to tarry in Normandy far longer than he originally planned. He died of food poisoning from eating "a surfeit of lampreys" (of which he was excessively fond) on the 1st day of December of this year in Saint-Denis-en-Lyons (now Lyons-la-Forêt), Normandy.