| 1075 | | Construction of Windsor Castle
|
| | Construction of Windsor castle started by William the Conqueror. |
| 1121 | | Henry I marries Adeliza
|
| | Henry I married Adeliza of Louvain at Windsor Castle. Adeliza was his second wife. They did not have any children. |
| 1173 - 1179 | Remodelling of Windsor Castle
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| | Henry II carried out major rebuilding work at Windsor Castle, including raising the height of the keep and improved the walls around the bailey. He added towers to the walls and built himself a house, the basement of which survives. |
| 1175 | Oct 6 | Treaty of Windsor
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| | A treaty signed by Henry II and Rory O'Connor allowing O'Connor control of the areas of Ireland other than Leinster, Meath, Waterford and Dublin which were controlled by the English King. O'Connor agreed to pay Henry an annual sum of money and to provide one hide from each ten animals slaughtered every year. |
| 1185 | Apr | John is knighted
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| | John is knighted by his father at Windsor Castle before travelling to Ireland. |
| 1210 | Jun 10 | John lands in Ireland
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| | John landed at Waterford looking for the rebel baron William de Broase who had fled to Ireland. John took the opportunity to visit his lands in Ireland receiving homage from the Irish Chieftains. de Broase fled but his wife and son were captured, taken back to England and starved to death in Windsor Castle. |
| 1255 | Oct | Edward and Eleanor return to England
|
| | After the marriage at a Cistercian convent in Castile, Edward and Eleanor returned via Dover to England. Eleanor lived initially at Windsor Castle. |
| 1312 | Nov | Future Edward III is born
|
| | Edward the future king of England was born at Windsor Castle and was known as Edward Windsor. |
| 1340 | | Building work at Windsor Castle
|
| | The Round Tower was rebuilt at Windsor Castle. |
| 1344 | Jan 19 | First Round Table at Windsor
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| | A jousting tournament at Windsor castle may have been the time of the creation of the Order of the Garter based on the King Arthur's knights of the Round Table. The formal creation of the Order occurred in 1348. |
| 1348 | Apr 23 | Creation of the Order of the Garter
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| | On St. George's Day at Windsor Castle, the Order of the Garter was created. The initial Knights of the Order were: The King (Edward III); the Prince of Wales (The Black Prince); Henry, Earl (afterwards Duke) of Lancaster; Thomas Beauchamp, 3rd Earl of Warwick; the Captal of Buch; Ralph, Lord Stafford; Motacute, Earl of Salisbury; Sir Roger Mortimer; Sir John (afterward Lord) Lisle; Sir Bartholomew (afterwards Lord) Burghershe; Sir John Beauchamp; Lord Mohun; Sir Hugh Courtenay; Sir Thomas Holland; Lord Grey; Sir Richard FitzSimon; Sir Myles Stapleton; Sir Thomas Wales; Sir Hugh Wrottesley; Sir Neel Loryng; Sir John Chandos; Sir James Audley; Sir Otho Holland; Sir Henry Eam; Sir Sanchete d'Ambrichecourt; and Sir Walter Paveley. |
| 1358 | Apr 23 | A Splendid Tournament at Windsor
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| | To celebrate St. George's day Edward III held a large tournament at Windsor Castle. Edward, the Black Prince, oversaw the proceedings and Kings from all over Europe were given safe passage to take part in the games. |
| 1362 | Jul | The Black Prince is given Gascony
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| | Edward III transferred control of Gascony to his eldest son, the Black Prince. Edward the Black Prince had just married Joan of Kent at Windsor and together they created a magnificent court in Bordeaux. |
| 1400 | Jan | A plot to kill the new King
|
| | Supporters of Richard II planned to attack king Henry during a tournament held over Christmas at Windsor Castle. The plot was betrayed by Edward, Earl of Rutland, son of the Duke of York. Henry and his family escaped to London, and by the time the king returned to Windsor with an army, the rebels had been dealt with by local people. |
| 1438 | Qtr 1 | Owen Tudor is escapes
|
| | Somehow Owen escaped from the Newgate prison along with his priest and servant but was soon recaptured and sent to Windsor Castle. |
| 1439 | Jul | Owen Tudor is pardoned
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| | Owen Tudor was pardoned for all crimes he had been accused of and released from Windsor Castle. He was taken in by the King and given a regular income. Owen and his sons proved to be faithful Lancastrian supporters. |
| 1477 | | Work starts on St. George's Chapel
|
| | The construction of the massive church at Windsor Castle was begun by Edward IV. The church was not completed until 1528 in the reign of Henry VIII some fifty years later. |
| 1537 | Oct 24 | Jane Seymour dies
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| | Jane Seymour died after complications with the birth of Edward VI. She was buried in St. George's Chapel, Windsor Castle. |
| English Civil War Section - Under Construction |
| 1642 | Nov 4 | Prince Rupert attacks Windsor Castle
|
| | In early November Charles took Reading while Prince Rupert was attacking Windsor Castle. Prince Rupert's efforts failed so he turned his attention south to Brentford dealing the Parliamentary forces a heavy blow. Charles' next objective was to take London but the Londoners put an army together. When the Londoners' army was reinforced with the army of the Earl of Essex there was a standoff. The Royalist and Parliamentary armies faced each other at Turnham Green but Charles was outnumbered and chose to withdraw. |