Jonas I Losovičius

Biography

Losovičius parents were Vilnian townspeople of bourgeoisie class. Losovičius was Lithuanian. According to the Vilnius University professor Piotr Wijuk Kojałowicz, Losovičius was Lithuanian by nationality .

On 12 January 1463 or 24 January 1463 Losovičius was appointed as the Bishop of Lutsk and served in this position until 4 May 1468. Consequently, Losovičius in 1465 moved the residence of the Bishop of Lutsk to Janów Podlaski, which belonged to the Grand Duchy of Lithuania since the early 14th century and its first church was funded by the Lithuanian Grand Duke Vytautas the Great in 1428. According to Kojałowicz, Losovičius built the Bishops Chapel at Vilnius Cathedral. Losovičius also participated in political affairs and communicated with Masters of Livonia.

Losovičius was a supporter of the Franciscans and a diligent assistant of Casimir IV Jagiellon, Grand Duke of Lithuania and King of Poland.