This Palatine house was regnant for many generations at Heidelberg Castle, and there, at a remote medieval date, reigned a prince named Louis III, who esteemed literature and painting. A fond parent he was besides, devoted to his two sons, the elder called Louis and the younger Frederick; and from the outset he attended carefully to the education of the pair, choosing as their tutor a noted scholar, one Kenmat, while he allowed this tutor's daughter Eugenia to be taught along with the princely pupils, and he also admitted to the group an Italian boy, Rafaello. These four children grew up together, and the Palatine prince was pleased to mark that Frederick, though full of martial ardour, showed intellectual tastes as well; yet the father did not live long to watch the growth of the boy's predilection therein, and there came a day when the crown of Louis III was acquired by his heir, Louis IV. Still quite young, the latter was already affianced to Margaret of Savoy; and this engagement had incensed various nobles of the Rhine, especially the Count of Luzenstein. He was eager that his own house should become affiliated with the Palatinate, and while he knew that there was little hope of frustrating Louis' prospective wedding, this did not nullify his ambitions. For was it not possible that the marriage might prove without issue? And, as that would ultimately set Frederick on the Palatine throne, Luzenstein determined that his daughter Leonora should wed the younger of the two princes. She herself was equally eager for the union, and though the affair was not definitely arranged in the meantime, it was widely understood that at no very distant date Leonora's betrothal would be announced.