Erik IX References Erik IX king of Sweden Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of EncyclopĂŠdia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Christianity/ Papal missionSwedenâs Eric IX controlled Finland and in 1155 required the Finns to be baptized, but only in 1291, with the appointment of Magnus, the first Finnish bishop, was evangelization completed. Read MoreSwedenâs Eric IX controlled Finland and in 1155 required the Finns to be baptized, but only in 1291, with the appointment of Magnus, the first Finnish bishop, was evangelization completed. Read More