At the end of the 14th century the Duchess of Burgundy, Marguerite de Flandre, was offered by her husband, Duke Philippe le Hardi, the old castle of Germolles. She decides to make it a "modern" home: to do this, she designs with the artists at the service of the court a "palace of the fields", a residence both sober and elegant, richly decorated, but above all bucolic. Although part of the castle of Marguerite de Flandre is now extinct, the visit of the places allows to apreciate the innovative character of this house, through its organization and its decorations. Discovering the storeroom or a service room, the chapels or the large room, the apartment of Marguerite of Bavaria (the second duchess of Burgundy) or the ducal suite, we measure the raids of the court of Burgundy at the end of the Middle Ages and the new look on nature, both announcing the Renaissance to come. The evolutions of the castle and its surroundings after the medieval period allow to understand the adaptation of the place to more recent periods, where one knew to preserve the initial spirit, notably with the plantation of an English park in the middle of the nineteenth century.