In 1386, Jadwiga of Poland entered a marriage of convenience with Władysław II Jagiełło, the Grand Duke of Lithuania, thus forming the Jagiellonian dynasty and the Polish–Lithuanian union which spanned the late Middle Ages and early Modern Era. The partnership between Poles and Lithuanians brought the vast multi-ethnic Lithuanian territories into Poland's sphere of influence and proved beneficial for its inhabitants, who coexisted in one of the largest European political entities of the time.
in 1386 jadwiga of poland entered a marriage of convenience with władysław ii jagiełło the grand duke of lithuania thus forming the jagiellonian dynasty and the polish–lithuanian union which spanned the late middle ages and early modern era the partnership between poles and lithuanians brought the vast multi-ethnic lithuanian territories into poland's sphere of influence and proved beneficial for its inhabitants who coexisted in one of the largest european political entities of the time