 The county of Vianden can also be included as it had been a vassal of the counts and dukes of Luxembourg since about 31 July 1264.In 1411, Sigismund of Luxembourg lost the duchy to his niece Elisabeth because he defaulted on a loan.Elizabeth later sold the duchy to the Duke of Burgundy, Philip the Good of the House of Valois-Burgundy, who paid her off in 1444.