 Complete the following phrase:  In 1414 Oswald became a member of the entourage of Friedrich IV, Duke of Austria and Count of Tyrol, at the Council of Constance 141418; a portrait of Oswald can be found in the councils chronicle by Ulrich von Richental. Oswald entered as a diplomat in the service of Sigismund, Holy Roman Emperor and King of Hungary. His first diplomatic voyage brought him to England, Scotland and Portugal, where he participated in the 