http://en.wikipedia.org/wiki/Donar%27s_Oak

(Christians ‘burned the books’ of the pagans) Jove’s Oak ( interpretatio romana for Donar ‘s Oak and therefore sometimes referred to as Thor’s Oak ) was a sacred tree of the Germanic pagans located in an unclear location around what is now the region of Hesse , Germany . According to the 8th century Vita Bonifatii auctore Willibaldi , the Anglo-Saxon missionary Saint Boniface and his retinue cut down the tree earlier the same century.

Donar’s Oak – Wikipedia