Wenceslaus I of Luxembourg

Wenceslaus I, through his marriage to Joanna of Brabant and his family's influence, secured the elevation of the County of Luxembourg to a Duchy by Holy Roman Emperor Charles IV. This increased Luxembourg's status and Wenceslaus's prestige.

Wenceslaus I, as Duke of Brabant through his wife Joanna, fought against Louis of Male, Count of Flanders, who claimed Brabant. The war ended with the Treaty of Ath in 1357, which confirmed Wenceslaus's rule but ceded some territories.

Wenceslaus I was a noted poet and patron of the arts, commissioning works such as the 'Roman de la Rose' and supporting the development of courtly literature in Luxembourg and Brabant. His court became a center of cultural activity.