Prokop, Krzysztof Rafał
(Szczecińskie Wydawnictwo Archidiecezjalne „Ottonianum", 1992)
John I (1317-1370) from prince’s house of Sachsen-Lauenburg. Being an archdeacon of Dymin (Demmin) he became on 3rd of September 1343 an ordinary bishop of St John Baptist’s see in Kamień (Canmin). The most part of his ...