@roger,
The Most Noble Order of the Garter
The Oldest and Highest British Order of Chivalry, founded in 1348 by Edward III.
The Order consists of Her Majesty The Queen who is Sovereign of the
Order, His Royal Highness The Prince of Wales and 24 Knights Companions.
The origin of the symbol of the Most Noble Order of the Garter, a blue 'garter' with the motto Honi Soit Qui Mal Y Pense will probably never be known for certain as the earliest records of the order were destroyed by fire, however the story goes that at a Ball possibly held at Calais, Joan Countess of Salisbury dropped her garter and King Edward seeing her embarrassment picked it up and bound it about his own leg saying in French, Evil, (or shamed) be he that that thinks evil of it' this is almost certainly a later fiction. This fable appears to have originated in France and was, perhaps, invented to try and bring discredit on the Order. There is a natural unwillingness to believe that the World's foremost Order of Chivalry had so frivolous a beginning.
It is thought more likely that as the garter was a small strap used as a device to attach pieces of armour, it might have been thought appropriate to use the garter as a symbol of binding together in common brotherhood. Whilst the motto probably refers to the leading political topic of the 1340's, Edward's claim to the throne of France. The patron saint of the Order of the Garter is St George and as he is the patron saint of soldiers and also of England, the spiritual home of the order has therefore always been St George's Chapel in Windsor Castle.