"From Friesland he [St. Boniface] went into Hesse and part of Saxony; and wherever he came, baptized many thousands of idolaters, destroyed temples, and built churches.
... The saint returning to his mission in Hesse, continued his spiritual conquests, and cut down a tall oak consecrated to Jupiter, the timber of which he employed in building a chapel in honor of the prince of the apostles. He founded many churches, and a
monastery at Orfordt. ...
The saint went himself to Rome for the third time in 738 to visit the
tombs of the apostles, and to confer with his holiness about the churches he had founded. The pope received him as a living saint, and appointed him legate of the apostolic see in Germany." (Extracted from, "The Lives of The Fathers, Martyrs,
and other Principal Saints", Vol. IV, by Fr. Alban Butler, 1846 A.D.)