The 1378 Great Western Schism gave a new direction to the Luxemburgs’ traditionalpro-Valois politics. The House of Luxemburg took an abrupt turn away from the Frenchorientation, who adhered to the obedience to the Avignon pope and were seeking fornew partners. At the beginning of the 15th century, even amidst the Orléans-Armagnacvs. Burgundy antagonism, Sigismund had quite good contacts with the duke ofBurgundy, probably stemming from their co-operation of the crusade of Nicopolis in1396, the Flemish participation of which the article also investigates. Sigismund camecloser to Burgundy at the Council of Constance, even though they had taken an oppositestand in important issues such as the inheritance of Brabant and Luxemburg.The Luxemburgs themselves also had possessions in the Low Countries, because in the14th century the dynasty, besides Luxemburg, also owned the Duchy of Brabant andLimburg. In the 15th century, partly because of the Burgundians gaining substantialterritories, they partially opposed their rights, thereby bringing forth conflicts within theLow Countries. The article explores the relations of the House of Burgundy with theprovinces of the Netherlands, especially the county of Flanders and the Flemish cities.When it comes to ‘Burgundian’ contacts, it is fundamentally taken as relations withthe Low Countries, particularly Flanders. The study examines the relationships thatSigismund maintained with the political figures of the Low Countries, especially thecounts of Holland and Zeeland from the House of Wittelsbach, the duke of Gelderlandand Juliers/Jülich asd well as the bishops of Utrecht and Lüttich/Luik.I also wish to shed light upon contacts beyond the scene of ‘high politics’. Althoughwe can not speak of daily relations between Hungary and the provinces of the LowCountries, there were complex contacts. Hundreds of Flemish knights took up the Crossagainst the Ottomans and fought at Nicopolis, the campaign of which was also funded by 24 Attila Báránythe citizens of Flanders. A range of cities ...