 Henry VII made more use of Windsor . In 1488 , shortly after succeeding to the throne , he held a massive feast for the Order of the Garter at the castle . He completed the roof of St George 's Chapel , and set about converting the older eastern Lady Chapel into a proposed shrine to Henry VI , whose canonisation was then considered imminent . In the event , Henry VI was not canonised and the project was abandoned , although the shrine continued to attract a flood of pilgrims . Henry VII appears to have remodelled the King 's Chamber in the palace , and had the roof of the Great Kitchen rebuilt in 1489 . He also built a three @-@ storied tower on the west end of the palace , which he used for his personal apartments . Windsor began to be used for international diplomatic events , including the grand visit of Philip I of Castile in 1506 . William de la Pole , one of the surviving Yorkist claimants to the throne , was imprisoned at Windsor Castle during Henry 's reign , before his execution in 1513 . 
