The Greenlander and Eric sagas say that Leif Eriksson was the man who introduced Christianity to Greenland. But Magnus Magnusson reported that Jon Johannesson of Iceland proved conclusively that Leif did not introduce Christianity to Greenland as the sagas report. King Olaf's historians do not credit him with a Christian Greenland even though the sagas said that Leif made the introduction during King Olaf's reign. (Magnusson, 1966)