arms of her husband when she marries. The members of the cadet branches had the right to include the differentiated arms of Portugal in their coat of arms until the fourth generation, when they ceased to have the status of members of the Royal Family. From the second generation on, their coat of arms would be the differentiated arms of Portugal quartered with the arms of the other non-royal ancestors of the person. The differentiated arms of Portugal always occupy the first quarter of the field of the shield. The illegitimate children of the Monarchs also bear the arms of Portugal, but defaced with special marks of distinction. These marks varied accordingly with the old Portuguese usages of classifying illegitimate children either as natural children when both parents were not married, as bastards when just one of the parents was married, as adulterine when both parents were married but not to each other, as incestuous when the parents were close relatives or as sacrilegious when one or both parents had taken religious vows. The corresponding defacing marks would be a bend dexter for natural children, a baton sinister for bastards, a bend sinister azur for adulterine, a bend sinister vert for incestuous and a bend sinister gules for sacrilegious children. In the late 17th century, the system of crowns and coronets to be used in the coat of arms of the members of the Royal Family was defined. From then on the royal crown (with four arches) was to be included in the coat of arms of the King and of the Queen. The princely crown (with two arches) was to be used in the coat of arms of the Prince heir (titled Prince of Brazil from 1645 to 1815 and Prince Royal from then on) and of the eldest son of the Prince heir (titled Prince of Beira since 1734). The ducal coronet was to be used in the coats of arms of the infantes. From the 19th century on, it was common to represent the achievement of arms of the Monarchs with a pavilion issuing from the royal crown, which formed a backdrop for the shield. The Royal pavilion was purple with an ermine facing. Occasionally it was charged with elements of the coat of arms of Portugal, like quinas and castles. Heraldry of the nobility The system of heraldry of the Portuguese non-royal nobility applies to the