On 17 February 1331, he was elected Grand Master ("Hochmeister"), succeeding Werner von Orseln who had been killed the year before. While the Polish–Teutonic War over Pomerelia continued, again culminating in the Battle of Płowce on 27 September 1331, Luther further promoted the colonisation and Christianisation of the Order's lands. In his presence, Königsberg Cathedral was consecrated in 1333; Luther also had Malbork Castle extended and became known as a patron of the arts, such as the work of Peter of Dusburg, whose "Chronicon terrae Prussiae" was translated by chaplain Nikolaus von Jeroschin on his behalf.