Matthias of Trakai

[1] Matthias was nominated to the newly established post of Samogitian bishop by Vytautas the Great and was consecrated on 24 October 1417 in Trakai.

According to Jan Długosz, he was a Vilnian of Livonian German origin, while Vytautas has mentioned him being a Lithuanian.

[2] 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 Council of Basel and set up the Inquisition to combat the Hussites, founded many churches and strenuously defended the rights and privileges of the Lithuanians.

[3] Matthias took care that new Catholic priests being ordained would be fluent in the Lithuanian language.