Is it better for a prince to be handsome or ugly ? And what are the criteria of beauty or ugliness in Early Modern History ? Philosophers of this time debated the first question and later Historians answered the second. Our purpose is more limited. We want to know the role and criteria of seduction in the many summit meetings between 1494 and 1788 in Europe. This paper is not about the representations of princes but about the interaction of two persona, two presences in a performance stage. First we note seduction is not the monopoly of fairer sex. Princesses but also princes are sensitive to male seduction. More than a pretty face and a tall stature, it’s the prince’s mastery of conversation that wins him over. On another note, physical attractiveness and good health of both princesses and princes can play a role in the choice of spouses, an important reason for summit interviews. On this occasion, the distinguished visitor can spot the young boys and girls likely to please and bear children, even if marital alliances are based above all on dynastic and political alliances. Lastly it’s not so much the beauty of the women as their gentleness and goodness that win over the interviewers. The role of a princess in the society of princes is not just to have children. She must be a mediator like Virgin Mary or a supplicant like Abigaïl or Sygambis.