Ancient and modern arms

Ancient and modern are terms used in heraldry to differentiate two different coats of arms used at different periods by a family or other bearer. Reasons for changing arms have been numerous, the most famous being the change in the French royal arms to show three fleurs-de-lis instead of semee de lis, possibly to symbolize the Holy Trinity. The reasons for other changes were more prosaic, for example where a court of chivalry ordered a change or differencing where two families claimed the same arms, as in the famous case of Scrope v Grosvenor. The resulting two versions of arms are referred to as "France ancient" and "France modern", "Grosvenor ancient" and "Grosvenor modern".