bearing her arms without crest and the St John the Evangelist'''s Eagle.Princess of Isabella's coat of arms with crest: |- ||| 1478–1497||On the tomb of John, Prince of Asturias and Girona in St Thomas's Royal Monastery, sculpted by Domenico Fancelli, is shown the undifferenced Catholic Monarchs's coat of arms without crest supported by the St John the Evangelists Eagle and two putti frequently used as sculptural decoration but not prominently heraldic supporters in Spanish royal heraldry. |- |align="center" colspan="2"| 1506–1516||When the House of Habsburg inherited the Crowns of Castile and Aragon marks of Cadency – a label of three points – were added to the heirs apparent's arms, as was usual in the heraldry of many European monarchies. Prince Charles (Charles I as King of Spain and Charles V as Holy Roman Emperor) used his father's arms – A quartered shield, depicting Austria, new Burgundy, old Burgundy, Brabant and Flanders on an escutcheon – with a label argent. These arms were not used as Prince of Asturias because Prince Charles did not add the arms of Castile and Aragon. |- | ||1528–1556|| Prince Philip (Philip II as King of Spain and Philip I of Portugal) used his father's arms differenced with a label argent or azure. The Prince Philip's arms are shown on many Prince's armours. Now these armours have been kept at the Royal Armoury in the Royal Palace of Madrid. Sometimes, Philip also used the undifferenced arms of his father. |- | ||1560–1568|| In 1568 Prince Carlos, the eldest son of Philip II, died and an Ambrosio Morales's report for the Prince's sepulchre said his arms were the Royal Arms but with "a label azure with its three short points". Prince Carlos also used the royal arms differenced with a label argent. |- | ||1584–1598|| Prince Philip (Philip III as King of Spain and Philip II of Portugal) sometimes used a new label argent variant wavy azure. |- | ||1608–1665||The eldest son of Philip III, Prince Philip (Philip IV as King of Spain and Philip III of Portugal), used the Royal Arms with label argent or azure. Philip's son, Prince Balthasar Charles also bore the same differences. |- | ||1707–17611761–1931|| The shields of the House of Bourbon's heirs apparent hardly ever depicted differences. Chronicler King of Arms Juan José Vilar y Psayla (1830–1894) said the arms of the Prince of Asturias were differentiated by a crown of four-half-arches,