 Complete the following phrase:  Matthias was a Samogitian and Lithuanian speaker. According to Jan Długosz, he was a Vilnian of Livonian German origin, while Vytautas has mentioned him being a Lithuanian. The bishop has conducted the marriage of the King of Poland and Grand Duke of Lithuania Jogaila to his last wife Sophia of Halshany in the city of Navahrudak in 1422; he became the bishop of the Diocese of Vilnius later that year. Matthias sent representatives to the 