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At the end of the fifteenth century, Portugal knew a new king and, with that, a new page in the practice of heraldry. With the event of the Overseas Expansion, we will verify not only new iconographical elements in the heraldic arrangements but also, a whole new ideal that is, in fact, the culmination of a process that was being developed with the previous monarchs and the centralization of power.Analyzing some architectural and documental sources, this presentation aims to show the increasing importance of heraldry as a vehicle of royal power as well as a key-piece in the dialogue between the monarch and a new rising nobility. It is also the reflection of a new world that shapes personal imaginary.Date:  1 July 2013Place: International Medieval Congress, Leeds,Session 107 (Medieval Heraldry Revisited I: Creating ties of visuality. Heraldry and the display of social relationships)[cite]&#160;&#160;&#160;&#160;